18716172 has 48 divisors (see below), whose sum is σ = 45276000. Its totient is φ = 6013440.

The previous prime is 18716171. The next prime is 18716177. The reversal of 18716172 is 27161781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18716171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53454 + ... + 53802.

It is an arithmetic number, because the mean of its divisors is an integer number (943250).

Almost surely, 2^18716172 is an apocalyptic number.

18716172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18716172 is an abundant number, since it is smaller than the sum of its proper divisors (26559828).

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

18716172 is a wasteful number, since it uses less digits than its factorization.

18716172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 504 counting only the distinct ones).

The product of its digits is 4704, while the sum is 33.

The square root of 18716172 is about 4326.2191345331. The cubic root of 18716172 is about 265.5047789437.

The spelling of 18716172 in words is "eighteen million, seven hundred sixteen thousand, one hundred seventy-two".