220480019809 has 9 divisors (see below), whose sum is σ = 256480581297. Its totient is φ = 188980056804.

The previous prime is 220480019779. The next prime is 220480019869. The reversal of 220480019809 is 908910084022.

The square root of 220480019809 is 469553.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 220480019809 - 2²³ = 220471631201 is a prime.

It is a super-2 number, since 2×220480019809² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220480019869) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3253332 + ... + 3320410.

Almost surely, 2^220480019809 is an apocalyptic number.

220480019809 is the 469553-rd square number.

220480019809 is the 234777-th centered octagonal number.

It is an amenable number.

220480019809 is a deficient number, since it is larger than the sum of its proper divisors (36000561488).

220480019809 is an frugal number, since it uses more digits than its factorization.

220480019809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134172 (or 67086 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 220480019809 in words is "two hundred twenty billion, four hundred eighty million, nineteen thousand, eight hundred nine".