18973892 has 12 divisors (see below), whose sum is σ = 37947840. Its totient is φ = 8131656.

The previous prime is 18973831. The next prime is 18973897. The reversal of 18973892 is 29837981.

18973892 is an admirable number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18973897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338792 + ... + 338847.

It is an arithmetic number, because the mean of its divisors is an integer number (3162320).

Almost surely, 2^18973892 is an apocalyptic number.

It is an amenable number.

18973892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18973892 is a wasteful number, since it uses less digits than its factorization.

18973892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677650 (or 677648 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 18973892 is about 4355.9031210531. The cubic root of 18973892 is about 266.7178866891.

The spelling of 18973892 in words is "eighteen million, nine hundred seventy-three thousand, eight hundred ninety-two".