21899963175031 has 16 divisors (see below), whose sum is σ = 24069924541440. Its totient is φ = 19835400608640.

The previous prime is 21899963174923. The next prime is 21899963175037. The reversal of 21899963175031 is 13057136999812.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21899963175031 is a prime.

It is a super-2 number, since 2×21899963175031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21899963175037) 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, 115983621 + ... + 116172286.

It is an arithmetic number, because the mean of its divisors is an integer number (1504370283840).

Almost surely, 2^{21899963175031} is an apocalyptic number.

21899963175031 is a deficient number, since it is larger than the sum of its proper divisors (2169961366409).

21899963175031 is a wasteful number, since it uses less digits than its factorization.

21899963175031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232156134.

The product of its (nonzero) digits is 22044960, while the sum is 64.

The spelling of 21899963175031 in words is "twenty-one trillion, eight hundred ninety-nine billion, nine hundred sixty-three million, one hundred seventy-five thousand, thirty-one".