21426625452 has 48 divisors (see below), whose sum is σ = 50488728192. Its totient is φ = 7071811200.

The previous prime is 21426625417. The next prime is 21426625457. The reversal of 21426625452 is 25452662412.

It is a self number, because there is not a number n which added to its sum of digits gives 21426625452.

It is not an unprimeable number, because it can be changed into a prime (21426625457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3788827 + ... + 3794477.

It is an arithmetic number, because the mean of its divisors is an integer number (1051848504).

Almost surely, 2^21426625452 is an apocalyptic number.

It is an amenable number.

21426625452 is an abundant number, since it is smaller than the sum of its proper divisors (29062102740).

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

21426625452 is a wasteful number, since it uses less digits than its factorization.

21426625452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8718 (or 8716 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

The spelling of 21426625452 in words is "twenty-one billion, four hundred twenty-six million, six hundred twenty-five thousand, four hundred fifty-two".