21167363625 has 64 divisors (see below), whose sum is σ = 35978342400. Its totient is φ = 11048721600.

The previous prime is 21167363597. The next prime is 21167363627. The reversal of 21167363625 is 52636376112.

It is not a de Polignac number, because 21167363625 - 2⁵ = 21167363593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21167363627) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5285874 + ... + 5289876.

It is an arithmetic number, because the mean of its divisors is an integer number (562161600).

Almost surely, 2^21167363625 is an apocalyptic number.

21167363625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21167363625 is a deficient number, since it is larger than the sum of its proper divisors (14810978775).

21167363625 is a wasteful number, since it uses less digits than its factorization.

21167363625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319 (or 4309 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The spelling of 21167363625 in words is "twenty-one billion, one hundred sixty-seven million, three hundred sixty-three thousand, six hundred twenty-five".