220838604872 has 12 divisors (see below), whose sum is σ = 414074876355. Its totient is φ = 110418637848.

The previous prime is 220838604827. The next prime is 220838604893. The reversal of 220838604872 is 278406838022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 110419302436 + 110419302436 = 332294^2 + 332294^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332294.

It is a super-2 number, since 2×220838604872² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220838604872.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1246103 + ... + 1412249.

Almost surely, 2^220838604872 is an apocalyptic number.

It is an amenable number.

220838604872 is a deficient number, since it is larger than the sum of its proper divisors (193236271483).

220838604872 is an frugal number, since it uses more digits than its factorization.

220838604872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332300 (or 166149 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 50.

Multiplying 220838604872 by its sum of digits (50), we get a square (11041930243600 = 3322940²).

The spelling of 220838604872 in words is "two hundred twenty billion, eight hundred thirty-eight million, six hundred four thousand, eight hundred seventy-two".