18973560 has 32 divisors (see below), whose sum is σ = 56921040. Its totient is φ = 5059584.

The previous prime is 18973553. The next prime is 18973573. The reversal of 18973560 is 6537981.

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, 78937 + ... + 79176.

Almost surely, 2^18973560 is an apocalyptic number.

18973560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18973560 is an abundant number, since it is smaller than the sum of its proper divisors (37947480).

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

18973560 is a wasteful number, since it uses less digits than its factorization.

18973560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158127 (or 158123 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 18973560 is about 4355.8650116825. The cubic root of 18973560 is about 266.7163310276.

The spelling of 18973560 in words is "eighteen million, nine hundred seventy-three thousand, five hundred sixty".