18125839 has 6 divisors (see below), whose sum is σ = 18393680. Its totient is φ = 17859036.

The previous prime is 18125831. The next prime is 18125843. The reversal of 18125839 is 93852181.

It is not a de Polignac number, because 18125839 - 2³ = 18125831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18125798 and 18125807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18125831) 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, 37602 + ... + 38080.

Almost surely, 2^18125839 is an apocalyptic number.

18125839 is a deficient number, since it is larger than the sum of its proper divisors (267841).

18125839 is an frugal number, since it uses more digits than its factorization.

18125839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037 (or 558 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 18125839 is about 4257.4451258942. The cubic root of 18125839 is about 262.6834466750.

The spelling of 18125839 in words is "eighteen million, one hundred twenty-five thousand, eight hundred thirty-nine".