18697712 has 80 divisors (see below), whose sum is σ = 42854400. Its totient is φ = 7814400.

The previous prime is 18697703. The next prime is 18697727. The reversal of 18697712 is 21779681.

Its product of digits (42336) is a multiple of the sum of its prime divisors (216).

It is a self number, because there is not a number n which added to its sum of digits gives 18697712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125414 + ... + 125562.

It is an arithmetic number, because the mean of its divisors is an integer number (535680).

Almost surely, 2^18697712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18697712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21427200).

18697712 is an abundant number, since it is smaller than the sum of its proper divisors (24156688).

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

18697712 is a wasteful number, since it uses less digits than its factorization.

18697712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 216 counting only the distinct ones).

The product of its digits is 42336, while the sum is 41.

The square root of 18697712 is about 4324.0851055454. The cubic root of 18697712 is about 265.4174599755.

The spelling of 18697712 in words is "eighteen million, six hundred ninety-seven thousand, seven hundred twelve".