18997692 has 36 divisors (see below), whose sum is σ = 51566760. Its totient is φ = 5427744.

The previous prime is 18997679. The next prime is 18997703. The reversal of 18997692 is 29679981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15567 + ... + 16742.

It is an arithmetic number, because the mean of its divisors is an integer number (1432410).

Almost surely, 2^18997692 is an apocalyptic number.

18997692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18997692 is an abundant number, since it is smaller than the sum of its proper divisors (32569068).

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

18997692 is a wasteful number, since it uses less digits than its factorization.

18997692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32330 (or 32321 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 18997692 is about 4358.6341897434. The cubic root of 18997692 is about 266.8293597487.

It can be divided in two parts, 1899 and 7692, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 18997692 in words is "eighteen million, nine hundred ninety-seven thousand, six hundred ninety-two".