21023874025 has 36 divisors (see below), whose sum is σ = 32748626176. Its totient is φ = 13105778400.

The previous prime is 21023874019. The next prime is 21023874059. The reversal of 21023874025 is 52047832012.

It is a happy number.

It is not a de Polignac number, because 21023874025 - 2²⁷ = 20889656297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 475257 + ... + 517606.

Almost surely, 2^21023874025 is an apocalyptic number.

21023874025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21023874025 is a deficient number, since it is larger than the sum of its proper divisors (11724752151).

21023874025 is a wasteful number, since it uses less digits than its factorization.

21023874025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992902 (or 992886 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 21023874025 in words is "twenty-one billion, twenty-three million, eight hundred seventy-four thousand, twenty-five".