21113531898264 has 48 divisors (see below), whose sum is σ = 61581134706000. Its totient is φ = 6496471353024.

The previous prime is 21113531898211. The next prime is 21113531898311. The reversal of 21113531898264 is 46289813531112.

21113531898264 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 3 + 531 + 89 + 8 + 26 + 4 = 666.

It is a super-2 number, since 2×21113531898264² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21113531898264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11278595164 + ... + 11278597035.

It is an arithmetic number, because the mean of its divisors is an integer number (1282940306375).

Almost surely, 2^{21113531898264} is an apocalyptic number.

21113531898264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21113531898264 is an abundant number, since it is smaller than the sum of its proper divisors (40467602807736).

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

21113531898264 is a wasteful number, since it uses less digits than its factorization.

21113531898264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22557192224 (or 22557192217 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 21113531898264 in words is "twenty-one trillion, one hundred thirteen billion, five hundred thirty-one million, eight hundred ninety-eight thousand, two hundred sixty-four".