21235149474364 has 18 divisors (see below), whose sum is σ = 43228697144640. Its totient is φ = 9100778346072.

The previous prime is 21235149474311. The next prime is 21235149474403. The reversal of 21235149474364 is 46347494153212.

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, 54171299484 + ... + 54171299875.

Almost surely, 2^{21235149474364} is an apocalyptic number.

It is an amenable number.

21235149474364 is an abundant number, since it is smaller than the sum of its proper divisors (21993547670276).

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

21235149474364 is a wasteful number, since it uses less digits than its factorization.

21235149474364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108342599377 (or 108342599368 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 55.

The spelling of 21235149474364 in words is "twenty-one trillion, two hundred thirty-five billion, one hundred forty-nine million, four hundred seventy-four thousand, three hundred sixty-four".