18350172 has 24 divisors (see below), whose sum is σ = 47574800. Its totient is φ = 6116688.

The previous prime is 18350153. The next prime is 18350177. The reversal of 18350172 is 27105381.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18350177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84847 + ... + 85062.

Almost surely, 2^18350172 is an apocalyptic number.

18350172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18350172 is an abundant number, since it is smaller than the sum of its proper divisors (29224628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18350172 is a wasteful number, since it uses less digits than its factorization.

18350172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169922 (or 169914 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 18350172 is about 4283.7100742230. The cubic root of 18350172 is about 263.7626999867.

The spelling of 18350172 in words is "eighteen million, three hundred fifty thousand, one hundred seventy-two".