21513741464512 has 56 divisors (see below), whose sum is σ = 47563262150400. Its totient is φ = 9570910114560.

The previous prime is 21513741464461. The next prime is 21513741464513. The reversal of 21513741464512 is 21546414731512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513741464513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325065762 + ... + 325131937.

Almost surely, 2^{21513741464512} is an apocalyptic number.

21513741464512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21513741464512 is an abundant number, since it is smaller than the sum of its proper divisors (26049520685888).

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

21513741464512 is a wasteful number, since it uses less digits than its factorization.

21513741464512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650197769 (or 650197759 counting only the distinct ones).

The product of its digits is 806400, while the sum is 46.

The spelling of 21513741464512 in words is "twenty-one trillion, five hundred thirteen billion, seven hundred forty-one million, four hundred sixty-four thousand, five hundred twelve".