21634074625 has 32 divisors (see below), whose sum is σ = 29509788672. Its totient is φ = 15763680000.

The previous prime is 21634074613. The next prime is 21634074653. The reversal of 21634074625 is 52647043612.

It is not a de Polignac number, because 21634074625 - 2⁵ = 21634074593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98331 + ... + 230080.

It is an arithmetic number, because the mean of its divisors is an integer number (922180896).

Almost surely, 2^21634074625 is an apocalyptic number.

21634074625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21634074625 is a deficient number, since it is larger than the sum of its proper divisors (7875714047).

21634074625 is a wasteful number, since it uses less digits than its factorization.

21634074625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328474 (or 328464 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 21634074625 in words is "twenty-one billion, six hundred thirty-four million, seventy-four thousand, six hundred twenty-five".