21677634474 has 16 divisors (see below), whose sum is σ = 43363499040. Its totient is φ = 7224506480.

The previous prime is 21677634469. The next prime is 21677634487. The reversal of 21677634474 is 47443677612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308412 + ... + 372119.

It is an arithmetic number, because the mean of its divisors is an integer number (2710218690).

Almost surely, 2^21677634474 is an apocalyptic number.

21677634474 is an abundant number, since it is smaller than the sum of its proper divisors (21685864566).

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

21677634474 is a wasteful number, since it uses less digits than its factorization.

21677634474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685845.

The product of its digits is 4741632, while the sum is 51.

The spelling of 21677634474 in words is "twenty-one billion, six hundred seventy-seven million, six hundred thirty-four thousand, four hundred seventy-four".