18072039 has 8 divisors (see below), whose sum is σ = 24873472. Its totient is φ = 11659320.

The previous prime is 18072029. The next prime is 18072049. The reversal of 18072039 is 93027081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18072029) and next prime (18072049).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18072039 - 2⁴ = 18072023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18071997 and 18072015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072029) 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 7 ways as a sum of consecutive naturals, for example, 97069 + ... + 97254.

It is an arithmetic number, because the mean of its divisors is an integer number (3109184).

Almost surely, 2^18072039 is an apocalyptic number.

18072039 is a deficient number, since it is larger than the sum of its proper divisors (6801433).

18072039 is a wasteful number, since it uses less digits than its factorization.

18072039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194357.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 18072039 is about 4251.1220871671. The cubic root of 18072039 is about 262.4232955024.

The spelling of 18072039 in words is "eighteen million, seventy-two thousand, thirty-nine".