21080925600 has 576 divisors, whose sum is σ = 83204674560. Its totient is φ = 4528742400.

The previous prime is 21080925577. The next prime is 21080925611. The reversal of 21080925600 is 652908012.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 67351044 + ... + 67351356.

It is an arithmetic number, because the mean of its divisors is an integer number (144452560).

Almost surely, 2^21080925600 is an apocalyptic number.

21080925600 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 21080925600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41602337280).

21080925600 is an abundant number, since it is smaller than the sum of its proper divisors (62123748960).

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

21080925600 is a wasteful number, since it uses less digits than its factorization.

21080925600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 21080925600 in words is "twenty-one billion, eighty million, nine hundred twenty-five thousand, six hundred".