18772163 has 8 divisors (see below), whose sum is σ = 19784736. Its totient is φ = 17776000.

The previous prime is 18772157. The next prime is 18772177. The reversal of 18772163 is 36127781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18772163 - 2⁶ = 18772099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18772183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1718 + ... + 6363.

It is an arithmetic number, because the mean of its divisors is an integer number (2473092).

Almost surely, 2^18772163 is an apocalyptic number.

18772163 is a deficient number, since it is larger than the sum of its proper divisors (1012573).

18772163 is a wasteful number, since it uses less digits than its factorization.

18772163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8205.

The product of its digits is 14112, while the sum is 35.

The square root of 18772163 is about 4332.6854259224. The cubic root of 18772163 is about 265.7692753107.

The spelling of 18772163 in words is "eighteen million, seven hundred seventy-two thousand, one hundred sixty-three".