21310131910 has 64 divisors (see below), whose sum is σ = 41891328000. Its totient is φ = 7775222400.

The previous prime is 21310131901. The next prime is 21310131937. The reversal of 21310131910 is 1913101312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1163020 + ... + 1181200.

It is an arithmetic number, because the mean of its divisors is an integer number (654552000).

Almost surely, 2^21310131910 is an apocalyptic number.

21310131910 is a deficient number, since it is larger than the sum of its proper divisors (20581196090).

21310131910 is a wasteful number, since it uses less digits than its factorization.

21310131910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18437.

The product of its (nonzero) digits is 162, while the sum is 22.

The spelling of 21310131910 in words is "twenty-one billion, three hundred ten million, one hundred thirty-one thousand, nine hundred ten".