18807039 has 32 divisors (see below), whose sum is σ = 28976640. Its totient is φ = 12047616.

The previous prime is 18807037. The next prime is 18807043. The reversal of 18807039 is 93070881.

It is not a de Polignac number, because 18807039 - 2¹ = 18807037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18806994 and 18807012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18807037) 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, 112534 + ... + 112700.

It is an arithmetic number, because the mean of its divisors is an integer number (905520).

Almost surely, 2^18807039 is an apocalyptic number.

18807039 is a deficient number, since it is larger than the sum of its proper divisors (10169601).

18807039 is a wasteful number, since it uses less digits than its factorization.

18807039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18807039 is about 4336.7083139174. The cubic root of 18807039 is about 265.9337606184.

The spelling of 18807039 in words is "eighteen million, eight hundred seven thousand, thirty-nine".