18076172 has 18 divisors (see below), whose sum is σ = 32021724. Its totient is φ = 8928400.

The previous prime is 18076171. The next prime is 18076181. The reversal of 18076172 is 27167081.

It is a super-4 number, since 4×18076172⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (18076171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40583 + ... + 41025.

Almost surely, 2^18076172 is an apocalyptic number.

It is an amenable number.

18076172 is a deficient number, since it is larger than the sum of its proper divisors (13945552).

18076172 is a wasteful number, since it uses less digits than its factorization.

18076172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 18076172 is about 4251.6081663295. The cubic root of 18076172 is about 262.4432990155.

Subtracting 18076172 from its reverse (27167081), we obtain a palindrome (9090909).

The spelling of 18076172 in words is "eighteen million, seventy-six thousand, one hundred seventy-two".