18239079 has 24 divisors (see below), whose sum is σ = 26205520. Its totient is φ = 11280384.

The previous prime is 18239077. The next prime is 18239099. The reversal of 18239079 is 97093281.

It is not a de Polignac number, because 18239079 - 2¹ = 18239077 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 (18239077) 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 23 ways as a sum of consecutive naturals, for example, 94407 + ... + 94599.

Almost surely, 2^18239079 is an apocalyptic number.

18239079 is a deficient number, since it is larger than the sum of its proper divisors (7966441).

18239079 is a wasteful number, since it uses less digits than its factorization.

18239079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 18239079 is about 4270.7234750098. The cubic root of 18239079 is about 263.2293440105.

The spelling of 18239079 in words is "eighteen million, two hundred thirty-nine thousand, seventy-nine".