18361172 has 12 divisors (see below), whose sum is σ = 32879616. Its totient is φ = 8967000.

The previous prime is 18361171. The next prime is 18361193. The reversal of 18361172 is 27116381.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18361171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53204 + ... + 53547.

It is an arithmetic number, because the mean of its divisors is an integer number (2739968).

Almost surely, 2^18361172 is an apocalyptic number.

It is an amenable number.

18361172 is a deficient number, since it is larger than the sum of its proper divisors (14518444).

18361172 is a wasteful number, since it uses less digits than its factorization.

18361172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106798 (or 106796 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 18361172 is about 4284.9938156315. The cubic root of 18361172 is about 263.8153935917.

The spelling of 18361172 in words is "eighteen million, three hundred sixty-one thousand, one hundred seventy-two".