21264694156422 has 12 divisors (see below), whose sum is σ = 46073504005620. Its totient is φ = 7088231385468.

The previous prime is 21264694156417. The next prime is 21264694156441. The reversal of 21264694156422 is 22465149646212.

It is a happy number.

21264694156422 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 4 + 69 + 4 + 156 + 422 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590685948772 + ... + 590685948807.

It is an arithmetic number, because the mean of its divisors is an integer number (3839458667135).

Almost surely, 2^{21264694156422} is an apocalyptic number.

21264694156422 is an abundant number, since it is smaller than the sum of its proper divisors (24808809849198).

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

21264694156422 is a wasteful number, since it uses less digits than its factorization.

21264694156422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181371897587 (or 1181371897584 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The spelling of 21264694156422 in words is "twenty-one trillion, two hundred sixty-four billion, six hundred ninety-four million, one hundred fifty-six thousand, four hundred twenty-two".