21164012026524 has 36 divisors (see below), whose sum is σ = 55342675129560. Its totient is φ = 6811406169120.

The previous prime is 21164012026513. The next prime is 21164012026559. The reversal of 21164012026524 is 42562021046112.

21164012026524 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 4 + 0 + 120 + 2 + 6 + 524 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 10136020042 + ... + 10136022129.

Almost surely, 2^{21164012026524} is an apocalyptic number.

It is an amenable number.

21164012026524 is an abundant number, since it is smaller than the sum of its proper divisors (34178663103036).

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

21164012026524 is a wasteful number, since it uses less digits than its factorization.

21164012026524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20272042210 (or 20272042205 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 21164012026524 in words is "twenty-one trillion, one hundred sixty-four billion, twelve million, twenty-six thousand, five hundred twenty-four".