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21327252 = 2238592069
BaseRepresentation
bin101000101011…
…0110110010100
31111010112111020
41101112312110
520424433002
62041041140
7346164402
oct121266624
944115436
1021327252
1111047531
1271861b0
13455959b
142b92472
151d142bc
hex1456d94

21327252 has 24 divisors (see below), whose sum is σ = 49845600. Its totient is φ = 7097376.

The previous prime is 21327227. The next prime is 21327259. The reversal of 21327252 is 25272312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9274 + ... + 11342.

It is an arithmetic number, because the mean of its divisors is an integer number (2076900).

Almost surely, 221327252 is an apocalyptic number.

It is an amenable number.

21327252 is an abundant number, since it is smaller than the sum of its proper divisors (28518348).

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

21327252 is a wasteful number, since it uses less digits than its factorization.

21327252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935 (or 2933 counting only the distinct ones).

The product of its digits is 1680, while the sum is 24.

The square root of 21327252 is about 4618.1437829500. The cubic root of 21327252 is about 277.3181537293.

Adding to 21327252 its reverse (25272312), we get a palindrome (46599564).

The spelling of 21327252 in words is "twenty-one million, three hundred twenty-seven thousand, two hundred fifty-two".

Divisors: 1 2 3 4 6 12 859 1718 2069 2577 3436 4138 5154 6207 8276 10308 12414 24828 1777271 3554542 5331813 7109084 10663626 21327252