18349172 has 12 divisors (see below), whose sum is σ = 32518080. Its totient is φ = 9058296.

The previous prime is 18349157. The next prime is 18349187. The reversal of 18349172 is 27194381.

It is an interprime number because it is at equal distance from previous prime (18349157) and next prime (18349187).

It is a super-2 number, since 2×18349172² = 673384226171168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28718 + ... + 29349.

It is an arithmetic number, because the mean of its divisors is an integer number (2709840).

Almost surely, 2^18349172 is an apocalyptic number.

It is an amenable number.

18349172 is a deficient number, since it is larger than the sum of its proper divisors (14168908).

18349172 is a wasteful number, since it uses less digits than its factorization.

18349172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58150 (or 58148 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 18349172 is about 4283.5933513815. The cubic root of 18349172 is about 263.7579086149.

The spelling of 18349172 in words is "eighteen million, three hundred forty-nine thousand, one hundred seventy-two".