19989432 has 48 divisors (see below), whose sum is σ = 54372240. Its totient is φ = 6634368.

The previous prime is 19989413. The next prime is 19989457. The reversal of 19989432 is 23498991.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 22093 + ... + 22979.

It is an arithmetic number, because the mean of its divisors is an integer number (1132755).

Almost surely, 2^19989432 is an apocalyptic number.

19989432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19989432 is an abundant number, since it is smaller than the sum of its proper divisors (34382808).

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

19989432 is a wasteful number, since it uses less digits than its factorization.

19989432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1205 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 19989432 is about 4470.9542605578. The cubic root of 19989432 is about 271.3939432938.

The spelling of 19989432 in words is "nineteen million, nine hundred eighty-nine thousand, four hundred thirty-two".