18091801 has 8 divisors (see below), whose sum is σ = 22266944. Its totient is φ = 14314320.

The previous prime is 18091793. The next prime is 18091813. The reversal of 18091801 is 10819081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18091801 - 2³ = 18091793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18091801.

It is not an unprimeable number, because it can be changed into a prime (18091861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99315 + ... + 99496.

It is an arithmetic number, because the mean of its divisors is an integer number (2783368).

Almost surely, 2^18091801 is an apocalyptic number.

It is an amenable number.

18091801 is a deficient number, since it is larger than the sum of its proper divisors (4175143).

18091801 is a wasteful number, since it uses less digits than its factorization.

18091801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198831.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 18091801 is about 4253.4457796003. The cubic root of 18091801 is about 262.5189150391.

The spelling of 18091801 in words is "eighteen million, ninety-one thousand, eight hundred one".