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21412612320 = 25351110339373
BaseRepresentation
bin10011111100010010…
…101000100011100000
32001021021121102001120
4103330102220203200
5322323112043240
613500430332240
71355424126111
oct237422504340
961237542046
1021412612320
119098952620
12419705a080
132033251008
141071b5c208
15854ca2ad0
hex4fc4a88e0

21412612320 has 192 divisors, whose sum is σ = 74297793024. Its totient is φ = 5140408320.

The previous prime is 21412612313. The next prime is 21412612337. The reversal of 21412612320 is 2321621412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 524154 + ... + 563526.

It is an arithmetic number, because the mean of its divisors is an integer number (386967672).

Almost surely, 221412612320 is an apocalyptic number.

21412612320 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 21412612320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37148896512).

21412612320 is an abundant number, since it is smaller than the sum of its proper divisors (52885180704).

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

21412612320 is a wasteful number, since it uses less digits than its factorization.

21412612320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39505 (or 39497 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 21412612320 in words is "twenty-one billion, four hundred twelve million, six hundred twelve thousand, three hundred twenty".