18121932 has 36 divisors (see below), whose sum is σ = 48504456. Its totient is φ = 5685120.

The previous prime is 18121921. The next prime is 18121973. The reversal of 18121932 is 23912181.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 18121896 and 18121905.

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, 14194 + ... + 15417.

It is an arithmetic number, because the mean of its divisors is an integer number (1347346).

Almost surely, 2^18121932 is an apocalyptic number.

18121932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18121932 is an abundant number, since it is smaller than the sum of its proper divisors (30382524).

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

18121932 is a wasteful number, since it uses less digits than its factorization.

18121932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29638 (or 29633 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 18121932 is about 4256.9862579059. The cubic root of 18121932 is about 262.6645716319.

The spelling of 18121932 in words is "eighteen million, one hundred twenty-one thousand, nine hundred thirty-two".