220320561020 has 72 divisors (see below), whose sum is σ = 551338870320. Its totient is φ = 73696062720.

The previous prime is 220320560987. The next prime is 220320561049. The reversal of 220320561020 is 20165023022.

It is a super-2 number, since 2×220320561020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2701490 + ... + 2781849.

It is an arithmetic number, because the mean of its divisors is an integer number (7657484310).

Almost surely, 2^220320561020 is an apocalyptic number.

220320561020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220320561020 is an abundant number, since it is smaller than the sum of its proper divisors (331018309300).

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

220320561020 is a wasteful number, since it uses less digits than its factorization.

220320561020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483403 (or 5483394 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 220320561020 its reverse (20165023022), we get a palindrome (240485584042).

The spelling of 220320561020 in words is "two hundred twenty billion, three hundred twenty million, five hundred sixty-one thousand, twenty".