21370102320 has 160 divisors (see below), whose sum is σ = 78322129920. Its totient is φ = 4716149760.

The previous prime is 21370102283. The next prime is 21370102333. The reversal of 21370102320 is 2320107312.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 170596 + ... + 268035.

It is an arithmetic number, because the mean of its divisors is an integer number (489513312).

Almost surely, 2^21370102320 is an apocalyptic number.

21370102320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21370102320 is an abundant number, since it is smaller than the sum of its proper divisors (56952027600).

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

21370102320 is a wasteful number, since it uses less digits than its factorization.

21370102320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438683 (or 438677 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

Adding to 21370102320 its reverse (2320107312), we get a palindrome (23690209632).

The spelling of 21370102320 in words is "twenty-one billion, three hundred seventy million, one hundred two thousand, three hundred twenty".