19989732 has 24 divisors (see below), whose sum is σ = 53306176. Its totient is φ = 5711328.

The previous prime is 19989727. The next prime is 19989743. The reversal of 19989732 is 23798991.

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, 118903 + ... + 119070.

Almost surely, 2^19989732 is an apocalyptic number.

19989732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19989732 is an abundant number, since it is smaller than the sum of its proper divisors (33316444).

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

19989732 is a wasteful number, since it uses less digits than its factorization.

19989732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237987 (or 237985 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 19989732 is about 4470.9878103166. The cubic root of 19989732 is about 271.3953009741.

The spelling of 19989732 in words is "nineteen million, nine hundred eighty-nine thousand, seven hundred thirty-two".