21325248972 has 48 divisors (see below), whose sum is σ = 55425669600. Its totient is φ = 7090675200.

The previous prime is 21325248961. The next prime is 21325248983. The reversal of 21325248972 is 27984252312.

21325248972 is a `hidden beast` number, since 2 + 1 + 32 + 524 + 8 + 97 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21325248961) and next prime (21325248983).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202897 + ... + 289512.

It is an arithmetic number, because the mean of its divisors is an integer number (1154701450).

Almost surely, 2^21325248972 is an apocalyptic number.

It is an amenable number.

21325248972 is an abundant number, since it is smaller than the sum of its proper divisors (34100420628).

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

21325248972 is a wasteful number, since it uses less digits than its factorization.

21325248972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492823 (or 492815 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 21325248972 in words is "twenty-one billion, three hundred twenty-five million, two hundred forty-eight thousand, nine hundred seventy-two".