18007380 has 48 divisors (see below), whose sum is σ = 56024640. Its totient is φ = 4801824.

The previous prime is 18007361. The next prime is 18007447. The reversal of 18007380 is 8370081.

It is a Harshad number since it is a multiple of its sum of digits (27).

18007380 is a modest number, since divided by 7380 gives 180 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16134 + ... + 17213.

It is an arithmetic number, because the mean of its divisors is an integer number (1167180).

Almost surely, 2^18007380 is an apocalyptic number.

18007380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18007380 is an abundant number, since it is smaller than the sum of its proper divisors (38017260).

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

18007380 is a wasteful number, since it uses less digits than its factorization.

18007380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33365 (or 33357 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 18007380 is about 4243.5103393299. The cubic root of 18007380 is about 262.1099513261.

It can be divided in two parts, 1800 and 7380, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 18007380 in words is "eighteen million, seven thousand, three hundred eighty".