18225039 has 32 divisors (see below), whose sum is σ = 29352960. Its totient is φ = 9833472.

The previous prime is 18225023. The next prime is 18225043. The reversal of 18225039 is 93052281.

It is a happy number.

It is not a de Polignac number, because 18225039 - 2⁴ = 18225023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18224997 and 18225015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18225059) 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 31 ways as a sum of consecutive naturals, for example, 46657 + ... + 47045.

It is an arithmetic number, because the mean of its divisors is an integer number (917280).

Almost surely, 2^18225039 is an apocalyptic number.

18225039 is a deficient number, since it is larger than the sum of its proper divisors (11127921).

18225039 is a wasteful number, since it uses less digits than its factorization.

18225039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 18225039 is about 4269.0794089593. The cubic root of 18225039 is about 263.1617841537.

The spelling of 18225039 in words is "eighteen million, two hundred twenty-five thousand, thirty-nine".