18985692 has 24 divisors (see below), whose sum is σ = 48327552. Its totient is φ = 5753200.

The previous prime is 18985679. The next prime is 18985709. The reversal of 18985692 is 29658981.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71784 + ... + 72047.

It is an arithmetic number, because the mean of its divisors is an integer number (2013648).

Almost surely, 2^18985692 is an apocalyptic number.

18985692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18985692 is an abundant number, since it is smaller than the sum of its proper divisors (29341860).

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

18985692 is a wasteful number, since it uses less digits than its factorization.

18985692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143849 (or 143847 counting only the distinct ones).

The product of its digits is 311040, while the sum is 48.

The square root of 18985692 is about 4357.2573942791. The cubic root of 18985692 is about 266.7731664888.

Subtracting 18985692 from its reverse (29658981), we obtain a square (10673289 = 3267²).

The spelling of 18985692 in words is "eighteen million, nine hundred eighty-five thousand, six hundred ninety-two".