18793172 has 6 divisors (see below), whose sum is σ = 32888058. Its totient is φ = 9396584.

The previous prime is 18793157. The next prime is 18793183. The reversal of 18793172 is 27139781.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 2114116 = 4084^2 + 1454^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2349143 + ... + 2349150.

It is an arithmetic number, because the mean of its divisors is an integer number (5481343).

Almost surely, 2^18793172 is an apocalyptic number.

It is an amenable number.

18793172 is a deficient number, since it is larger than the sum of its proper divisors (14094886).

18793172 is a wasteful number, since it uses less digits than its factorization.

18793172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698297 (or 4698295 counting only the distinct ones).

The product of its digits is 21168, while the sum is 38.

The square root of 18793172 is about 4335.1092258443. The cubic root of 18793172 is about 265.8683842065.

The spelling of 18793172 in words is "eighteen million, seven hundred ninety-three thousand, one hundred seventy-two".