18364013 has 4 divisors (see below), whose sum is σ = 19330560. Its totient is φ = 17397468.

The previous prime is 18364001. The next prime is 18364019. The reversal of 18364013 is 31046381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18364013 - 2²⁰ = 17315437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364019) 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, 483245 + ... + 483282.

It is an arithmetic number, because the mean of its divisors is an integer number (4832640).

Almost surely, 2^18364013 is an apocalyptic number.

It is an amenable number.

18364013 is a deficient number, since it is larger than the sum of its proper divisors (966547).

18364013 is an equidigital number, since it uses as much as digits as its factorization.

18364013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966546.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 18364013 is about 4285.3253085384. The cubic root of 18364013 is about 263.8289994930.

The spelling of 18364013 in words is "eighteen million, three hundred sixty-four thousand, thirteen".