21926490138324 has 72 divisors (see below), whose sum is σ = 58019867260992. Its totient is φ = 6968719105920.

The previous prime is 21926490138323. The next prime is 21926490138337. The reversal of 21926490138324 is 42383109462912.

It is a happy number.

21926490138324 is a `hidden beast` number, since 2 + 1 + 92 + 6 + 490 + 1 + 38 + 32 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21926490138323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42043182 + ... + 42561509.

It is an arithmetic number, because the mean of its divisors is an integer number (805831489736).

Almost surely, 2^{21926490138324} is an apocalyptic number.

It is an amenable number.

21926490138324 is an abundant number, since it is smaller than the sum of its proper divisors (36093377122668).

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

21926490138324 is a wasteful number, since it uses less digits than its factorization.

21926490138324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84605037 (or 84605032 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 21926490138324 in words is "twenty-one trillion, nine hundred twenty-six billion, four hundred ninety million, one hundred thirty-eight thousand, three hundred twenty-four".