18316801 has 4 divisors (see below), whose sum is σ = 18505732. Its totient is φ = 18127872.

The previous prime is 18316789. The next prime is 18316807. The reversal of 18316801 is 10861381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10861381 = 97 ⋅111973.

It can be written as a sum of positive squares in 2 ways, for example, as 13690000 + 4626801 = 3700^2 + 2151^2 .

It is a cyclic number.

It is not a de Polignac number, because 18316801 - 2⁷ = 18316673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18316801.

It is not an unprimeable number, because it can be changed into a prime (18316807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94320 + ... + 94513.

It is an arithmetic number, because the mean of its divisors is an integer number (4626433).

Almost surely, 2^18316801 is an apocalyptic number.

It is an amenable number.

18316801 is a deficient number, since it is larger than the sum of its proper divisors (188931).

18316801 is an equidigital number, since it uses as much as digits as its factorization.

18316801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188930.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18316801 is about 4279.8131968580. The cubic root of 18316801 is about 263.6027130004.

The spelling of 18316801 in words is "eighteen million, three hundred sixteen thousand, eight hundred one".