18001860 has 48 divisors (see below), whose sum is σ = 50694336. Its totient is φ = 4772992.

The previous prime is 18001859. The next prime is 18001871. The reversal of 18001860 is 6810081.

It is a self number, because there is not a number n which added to its sum of digits gives 18001860.

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, 11059 + ... + 12581.

It is an arithmetic number, because the mean of its divisors is an integer number (1056132).

Almost surely, 2^18001860 is an apocalyptic number.

18001860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18001860 is an abundant number, since it is smaller than the sum of its proper divisors (32692476).

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

18001860 is a wasteful number, since it uses less digits than its factorization.

18001860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 18001860 is about 4242.8598845590. The cubic root of 18001860 is about 262.0831661081.

The spelling of 18001860 in words is "eighteen million, one thousand, eight hundred sixty".