18079929 has 32 divisors (see below), whose sum is σ = 31015680. Its totient is φ = 10322640.

The previous prime is 18079907. The next prime is 18079931. The reversal of 18079929 is 92997081.

It is not a de Polignac number, because 18079929 - 2⁷ = 18079801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18079949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14719 + ... + 15899.

It is an arithmetic number, because the mean of its divisors is an integer number (969240).

Almost surely, 2^18079929 is an apocalyptic number.

It is an amenable number.

18079929 is a deficient number, since it is larger than the sum of its proper divisors (12935751).

18079929 is an frugal number, since it uses more digits than its factorization.

18079929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 18079929 is about 4252.0499761880. The cubic root of 18079929 is about 262.4614800620.

The spelling of 18079929 in words is "eighteen million, seventy-nine thousand, nine hundred twenty-nine".