18973100 has 36 divisors (see below), whose sum is σ = 41367144. Its totient is φ = 7553280.

The previous prime is 18973093. The next prime is 18973151. The reversal of 18973100 is 137981.

It is a super-2 number, since 2×18973100² = 719957047220000, which contains 22 as substring.

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, 33419 + ... + 33981.

Almost surely, 2^18973100 is an apocalyptic number.

18973100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18973100 is an abundant number, since it is smaller than the sum of its proper divisors (22394044).

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

18973100 is a wasteful number, since it uses less digits than its factorization.

18973100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 18973100 is about 4355.8122089916. The cubic root of 18973100 is about 266.7141755632.

The spelling of 18973100 in words is "eighteen million, nine hundred seventy-three thousand, one hundred".