18200801 has 4 divisors (see below), whose sum is σ = 18216132. Its totient is φ = 18185472.

The previous prime is 18200773. The next prime is 18200827. The reversal of 18200801 is 10800281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10800281 = 457 ⋅23633.

It can be written as a sum of positive squares in 2 ways, for example, as 11723776 + 6477025 = 3424^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 18200801 - 2⁶ = 18200737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18200701) 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, 5720 + ... + 8313.

It is an arithmetic number, because the mean of its divisors is an integer number (4554033).

Almost surely, 2^18200801 is an apocalyptic number.

It is an amenable number.

18200801 is a deficient number, since it is larger than the sum of its proper divisors (15331).

18200801 is a wasteful number, since it uses less digits than its factorization.

18200801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15330.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 18200801 is about 4266.2396791554. The cubic root of 18200801 is about 263.0450702732.

The spelling of 18200801 in words is "eighteen million, two hundred thousand, eight hundred one".