220618139 has 24 divisors (see below), whose sum is σ = 281917440. Its totient is φ = 171342864.

The previous prime is 220618117. The next prime is 220618157. The reversal of 220618139 is 931816022.

It is not a de Polignac number, because 220618139 - 2⁸ = 220617883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220618039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16262 + ... + 26564.

It is an arithmetic number, because the mean of its divisors is an integer number (11746560).

Almost surely, 2^220618139 is an apocalyptic number.

220618139 is a deficient number, since it is larger than the sum of its proper divisors (61299301).

220618139 is a wasteful number, since it uses less digits than its factorization.

220618139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359 (or 10352 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 220618139 is about 14853.2198192850. The cubic root of 220618139 is about 604.2459371173.

The spelling of 220618139 in words is "two hundred twenty million, six hundred eighteen thousand, one hundred thirty-nine".