18080879 has 4 divisors (see below), whose sum is σ = 18098184. Its totient is φ = 18063576.

The previous prime is 18080869. The next prime is 18080899. The reversal of 18080879 is 97808081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18080879 - 2¹² = 18076783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18080869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6977 + ... + 9210.

It is an arithmetic number, because the mean of its divisors is an integer number (4524546).

Almost surely, 2^18080879 is an apocalyptic number.

18080879 is a deficient number, since it is larger than the sum of its proper divisors (17305).

18080879 is a wasteful number, since it uses less digits than its factorization.

18080879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17304.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 18080879 is about 4252.1616855430. The cubic root of 18080879 is about 262.4660769466.

The spelling of 18080879 in words is "eighteen million, eighty thousand, eight hundred seventy-nine".