21113130504 has 64 divisors (see below), whose sum is σ = 53260574400. Its totient is φ = 6974263296.

The previous prime is 21113130487. The next prime is 21113130529. The reversal of 21113130504 is 40503131112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1373292 + ... + 1388580.

It is an arithmetic number, because the mean of its divisors is an integer number (832196475).

Almost surely, 2^21113130504 is an apocalyptic number.

21113130504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21113130504 is an abundant number, since it is smaller than the sum of its proper divisors (32147443896).

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

21113130504 is a wasteful number, since it uses less digits than its factorization.

21113130504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15814 (or 15810 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 21113130504 its reverse (40503131112), we get a palindrome (61616261616).

The spelling of 21113130504 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty thousand, five hundred four".