21413513511 has 32 divisors (see below), whose sum is σ = 34172768000. Its totient is φ = 13174169184.

The previous prime is 21413513503. The next prime is 21413513573. The reversal of 21413513511 is 11531531412.

21413513511 is a `hidden beast` number, since 2 + 1 + 4 + 135 + 13 + 511 = 666.

It is not a de Polignac number, because 21413513511 - 2³ = 21413513503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21413514511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2614020 + ... + 2622198.

It is an arithmetic number, because the mean of its divisors is an integer number (1067899000).

Almost surely, 2^21413513511 is an apocalyptic number.

21413513511 is a deficient number, since it is larger than the sum of its proper divisors (12759254489).

21413513511 is a wasteful number, since it uses less digits than its factorization.

21413513511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15660 (or 15654 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The spelling of 21413513511 in words is "twenty-one billion, four hundred thirteen million, five hundred thirteen thousand, five hundred eleven".