18019932 has 48 divisors (see below), whose sum is σ = 50883840. Its totient is φ = 4845312.

The previous prime is 18019931. The next prime is 18019943. The reversal of 18019932 is 23991081.

It is a junction number, because it is equal to n+sod(n) for n = 18019893 and 18019902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18019931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4882 + ... + 7737.

It is an arithmetic number, because the mean of its divisors is an integer number (1060080).

Almost surely, 2^18019932 is an apocalyptic number.

18019932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18019932 is an abundant number, since it is smaller than the sum of its proper divisors (32863908).

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

18019932 is a wasteful number, since it uses less digits than its factorization.

18019932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12650 (or 12648 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 18019932 is about 4244.9890459223. The cubic root of 18019932 is about 262.1708382139.

The spelling of 18019932 in words is "eighteen million, nineteen thousand, nine hundred thirty-two".