21320332013220 has 24 divisors (see below), whose sum is σ = 59696929637184. Its totient is φ = 5685421870176.

The previous prime is 21320332013207. The next prime is 21320332013257. The reversal of 21320332013220 is 2231023302312.

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, 177669433384 + ... + 177669433503.

It is an arithmetic number, because the mean of its divisors is an integer number (2487372068216).

Almost surely, 2^{21320332013220} is an apocalyptic number.

21320332013220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320332013220 is an abundant number, since it is smaller than the sum of its proper divisors (38376597623964).

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

21320332013220 is a wasteful number, since it uses less digits than its factorization.

21320332013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355338866899 (or 355338866897 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21320332013220 its reverse (2231023302312), we get a palindrome (23551355315532).

The spelling of 21320332013220 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirty-two million, thirteen thousand, two hundred twenty".