21600963072 has 120 divisors (see below), whose sum is σ = 67137554484. Its totient is φ = 6646431744.

The previous prime is 21600963071. The next prime is 21600963149. The reversal of 21600963072 is 27036900612.

21600963072 is a `hidden beast` number, since 2 + 16 + 0 + 0 + 9 + 630 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18622423296 + 2978539776 = 136464^2 + 54576^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21600963071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120393 + ... + 240200.

Almost surely, 2^21600963072 is an apocalyptic number.

It is an amenable number.

21600963072 is an abundant number, since it is smaller than the sum of its proper divisors (45536591412).

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

21600963072 is a wasteful number, since it uses less digits than its factorization.

21600963072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360630 (or 360611 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 21600963072 in words is "twenty-one billion, six hundred million, nine hundred sixty-three thousand, seventy-two".