21163131613024 has 48 divisors (see below), whose sum is σ = 43477807236192. Its totient is φ = 10121177899008.

The previous prime is 21163131612983. The next prime is 21163131613031. The reversal of 21163131613024 is 42031613136112.

It is a congruent number.

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, 23727202 + ... + 24602974.

It is an arithmetic number, because the mean of its divisors is an integer number (905787650754).

Almost surely, 2^{21163131613024} is an apocalyptic number.

It is an amenable number.

21163131613024 is an abundant number, since it is smaller than the sum of its proper divisors (22314675623168).

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

21163131613024 is a wasteful number, since it uses less digits than its factorization.

21163131613024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908639 (or 908631 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 21163131613024 its reverse (42031613136112), we get a palindrome (63194744749136).

The spelling of 21163131613024 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred thirty-one million, six hundred thirteen thousand, twenty-four".