18039960 has 48 divisors (see below), whose sum is σ = 58631040. Its totient is φ = 4810560.

The previous prime is 18039953. The next prime is 18039961. The reversal of 18039960 is 6993081.

18039960 = T₄₄₈ + T₄₄₉ + ... + T₅₈₂.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18039961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24696 + ... + 25415.

It is an arithmetic number, because the mean of its divisors is an integer number (1221480).

Almost surely, 2^18039960 is an apocalyptic number.

18039960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18039960 is an abundant number, since it is smaller than the sum of its proper divisors (40591080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18039960 is a wasteful number, since it uses less digits than its factorization.

18039960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50128 (or 50121 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 18039960 is about 4247.3474075004. The cubic root of 18039960 is about 262.2679309490.

The spelling of 18039960 in words is "eighteen million, thirty-nine thousand, nine hundred sixty".