18694201 has 4 divisors (see below), whose sum is σ = 18713332. Its totient is φ = 18675072.

The previous prime is 18694199. The next prime is 18694211. The reversal of 18694201 is 10249681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11048976 + 7645225 = 3324^2 + 2765^2 .

It is a cyclic number.

It is not a de Polignac number, because 18694201 - 2¹ = 18694199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18694211) 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, 8016 + ... + 10081.

It is an arithmetic number, because the mean of its divisors is an integer number (4678333).

Almost surely, 2^18694201 is an apocalyptic number.

It is an amenable number.

18694201 is a deficient number, since it is larger than the sum of its proper divisors (19131).

18694201 is a wasteful number, since it uses less digits than its factorization.

18694201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19130.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18694201 is about 4323.6791046515. The cubic root of 18694201 is about 265.4008458387.

The spelling of 18694201 in words is "eighteen million, six hundred ninety-four thousand, two hundred one".