18879039 has 6 divisors (see below), whose sum is σ = 27269736. Its totient is φ = 12586020.

The previous prime is 18879037. The next prime is 18879053. The reversal of 18879039 is 93097881.

It is not a de Polignac number, because 18879039 - 2¹ = 18879037 is a prime.

It is a super-2 number, since 2×18879039² = 712836227127042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18878985 and 18879003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18879037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1048827 + ... + 1048844.

It is an arithmetic number, because the mean of its divisors is an integer number (4544956).

Almost surely, 2^18879039 is an apocalyptic number.

18879039 is a deficient number, since it is larger than the sum of its proper divisors (8390697).

18879039 is a wasteful number, since it uses less digits than its factorization.

18879039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097677 (or 2097674 counting only the distinct ones).

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

The square root of 18879039 is about 4345.0016110469. The cubic root of 18879039 is about 266.2726913148.

The spelling of 18879039 in words is "eighteen million, eight hundred seventy-nine thousand, thirty-nine".