21413265124 has 24 divisors (see below), whose sum is σ = 38046032640. Its totient is φ = 10543083936.

The previous prime is 21413265103. The next prime is 21413265143. The reversal of 21413265124 is 42156231412.

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, 836142 + ... + 861370.

It is an arithmetic number, because the mean of its divisors is an integer number (1585251360).

Almost surely, 2^21413265124 is an apocalyptic number.

It is an amenable number.

21413265124 is a deficient number, since it is larger than the sum of its proper divisors (16632767516).

21413265124 is a wasteful number, since it uses less digits than its factorization.

21413265124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28467 (or 28465 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

Adding to 21413265124 its reverse (42156231412), we get a palindrome (63569496536).

The spelling of 21413265124 in words is "twenty-one billion, four hundred thirteen million, two hundred sixty-five thousand, one hundred twenty-four".