18997532 has 12 divisors (see below), whose sum is σ = 33873336. Its totient is φ = 9319440.

The previous prime is 18997481. The next prime is 18997543. The reversal of 18997532 is 23579981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44594 + ... + 45017.

It is an arithmetic number, because the mean of its divisors is an integer number (2822778).

Almost surely, 2^18997532 is an apocalyptic number.

It is an amenable number.

18997532 is a deficient number, since it is larger than the sum of its proper divisors (14875804).

18997532 is a wasteful number, since it uses less digits than its factorization.

18997532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89668 (or 89666 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 18997532 is about 4358.6158353312. The cubic root of 18997532 is about 266.8286106609.

The spelling of 18997532 in words is "eighteen million, nine hundred ninety-seven thousand, five hundred thirty-two".