21513741464511 has 24 divisors (see below), whose sum is σ = 31087848362480. Its totient is φ = 14336751686400.

The previous prime is 21513741464461. The next prime is 21513741464513. The reversal of 21513741464511 is 11546414731512.

21513741464511 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 3 + 74 + 1 + 4 + 64 + 511 = 666.

It is not a de Polignac number, because 21513741464511 - 2⁴² = 17115694953407 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 491282805 + ... + 491326593.

Almost surely, 2^{21513741464511} is an apocalyptic number.

21513741464511 is a deficient number, since it is larger than the sum of its proper divisors (9574106897969).

21513741464511 is a wasteful number, since it uses less digits than its factorization.

21513741464511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64407 (or 64404 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The spelling of 21513741464511 in words is "twenty-one trillion, five hundred thirteen billion, seven hundred forty-one million, four hundred sixty-four thousand, five hundred eleven".