18380040 has 64 divisors (see below), whose sum is σ = 63020160. Its totient is φ = 4200960.

The previous prime is 18380027. The next prime is 18380053. The reversal of 18380040 is 4008381.

It is an interprime number because it is at equal distance from previous prime (18380027) and next prime (18380053).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 10101 + ... + 11780.

It is an arithmetic number, because the mean of its divisors is an integer number (984690).

Almost surely, 2^18380040 is an apocalyptic number.

18380040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18380040 is an abundant number, since it is smaller than the sum of its proper divisors (44640120).

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

18380040 is a wasteful number, since it uses less digits than its factorization.

18380040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21902 (or 21898 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18380040 is about 4287.1948871028. The cubic root of 18380040 is about 263.9057285078.

The spelling of 18380040 in words is "eighteen million, three hundred eighty thousand, forty".