21355414774722 has 48 divisors (see below), whose sum is σ = 52915493816640. Its totient is φ = 6097460255136.

The previous prime is 21355414774697. The next prime is 21355414774741. The reversal of 21355414774722 is 22747741455312.

21355414774722 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 541 + 4 + 7 + 74 + 7 + 22 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56572572 + ... + 56948807.

It is an arithmetic number, because the mean of its divisors is an integer number (1102406121180).

Almost surely, 2^{21355414774722} is an apocalyptic number.

21355414774722 is an abundant number, since it is smaller than the sum of its proper divisors (31560079041918).

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

21355414774722 is a wasteful number, since it uses less digits than its factorization.

21355414774722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113522887 (or 113522884 counting only the distinct ones).

The product of its digits is 13171200, while the sum is 54.

The spelling of 21355414774722 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred fourteen million, seven hundred seventy-four thousand, seven hundred twenty-two".