18139832 has 32 divisors (see below), whose sum is σ = 36115200. Its totient is φ = 8517600.

The previous prime is 18139811. The next prime is 18139859. The reversal of 18139832 is 23893181.

It is a junction number, because it is equal to n+sod(n) for n = 18139792 and 18139801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19457 + ... + 20367.

It is an arithmetic number, because the mean of its divisors is an integer number (1128600).

Almost surely, 2^18139832 is an apocalyptic number.

It is an amenable number.

18139832 is a deficient number, since it is larger than the sum of its proper divisors (17975368).

18139832 is a wasteful number, since it uses less digits than its factorization.

18139832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067 (or 1063 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 18139832 is about 4259.0881653237. The cubic root of 18139832 is about 262.7510257812.

The spelling of 18139832 in words is "eighteen million, one hundred thirty-nine thousand, eight hundred thirty-two".