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21340000 = 25541197
BaseRepresentation
bin101000101100…
…1111101100000
31111011011222101
41101121331200
520430340000
62041220144
7346246513
oct121317540
944134871
1021340000
1111056070
127191654
134562326
142b96d7a
151d17e6a
hex1459f60

21340000 has 120 divisors (see below), whose sum is σ = 57862728. Its totient is φ = 7680000.

The previous prime is 21339991. The next prime is 21340003. The reversal of 21340000 is 4312.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 219952 + ... + 220048.

Almost surely, 221340000 is an apocalyptic number.

21340000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21340000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28931364).

21340000 is an abundant number, since it is smaller than the sum of its proper divisors (36522728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21340000 is an equidigital number, since it uses as much as digits as its factorization.

21340000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 21340000 is about 4619.5237849804. The cubic root of 21340000 is about 277.3733967845.

Adding to 21340000 its reverse (4312), we get a palindrome (21344312).

The spelling of 21340000 in words is "twenty-one million, three hundred forty thousand".

Divisors: 1 2 4 5 8 10 11 16 20 22 25 32 40 44 50 55 80 88 97 100 110 125 160 176 194 200 220 250 275 352 388 400 440 485 500 550 625 776 800 880 970 1000 1067 1100 1250 1375 1552 1760 1940 2000 2134 2200 2425 2500 2750 3104 3880 4000 4268 4400 4850 5000 5335 5500 6875 7760 8536 8800 9700 10000 10670 11000 12125 13750 15520 17072 19400 20000 21340 22000 24250 26675 27500 34144 38800 42680 44000 48500 53350 55000 60625 77600 85360 97000 106700 110000 121250 133375 170720 194000 213400 220000 242500 266750 388000 426800 485000 533500 666875 853600 970000 1067000 1333750 1940000 2134000 2667500 4268000 5335000 10670000 21340000