18839079 has 18 divisors (see below), whose sum is σ = 31655520. Its totient is φ = 10764936.

The previous prime is 18839071. The next prime is 18839081. The reversal of 18839079 is 97093881.

It is not a de Polignac number, because 18839079 - 2³ = 18839071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18839071) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20919 + ... + 21800.

It is an arithmetic number, because the mean of its divisors is an integer number (1758640).

Almost surely, 2^18839079 is an apocalyptic number.

18839079 is a deficient number, since it is larger than the sum of its proper divisors (12816441).

18839079 is a wasteful number, since it uses less digits than its factorization.

18839079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42739 (or 42729 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 18839079 is about 4340.4007879457. The cubic root of 18839079 is about 266.0846914072.

The spelling of 18839079 in words is "eighteen million, eight hundred thirty-nine thousand, seventy-nine".