18045801 has 32 divisors (see below), whose sum is σ = 29136000. Its totient is φ = 10995264.

The previous prime is 18045787. The next prime is 18045809. The reversal of 18045801 is 10854081.

18045801 is a `hidden beast` number, since 1 + 80 + 4 + 580 + 1 = 666.

It is not a de Polignac number, because 18045801 - 2¹⁰ = 18044777 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045809) 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 31 ways as a sum of consecutive naturals, for example, 14271 + ... + 15483.

It is an arithmetic number, because the mean of its divisors is an integer number (910500).

Almost surely, 2^18045801 is an apocalyptic number.

It is an amenable number.

18045801 is a deficient number, since it is larger than the sum of its proper divisors (11090199).

18045801 is a wasteful number, since it uses less digits than its factorization.

18045801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18045801 is about 4248.0349574833. The cubic root of 18045801 is about 262.2962337036.

Adding to 18045801 its reverse (10854081), we get a palindrome (28899882).

The spelling of 18045801 in words is "eighteen million, forty-five thousand, eight hundred one".