220173994 has 4 divisors (see below), whose sum is σ = 330260994. Its totient is φ = 110086996.

The previous prime is 220173959. The next prime is 220174001. The reversal of 220173994 is 499371022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140304025 + 79869969 = 11845^2 + 8937^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55043497 + ... + 55043500.

Almost surely, 2^220173994 is an apocalyptic number.

220173994 is a deficient number, since it is larger than the sum of its proper divisors (110087000).

220173994 is a wasteful number, since it uses less digits than its factorization.

220173994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110086999.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 220173994 is about 14838.2611514962. The cubic root of 220173994 is about 603.8401785378.

The spelling of 220173994 in words is "two hundred twenty million, one hundred seventy-three thousand, nine hundred ninety-four".