18338013 has 12 divisors (see below), whose sum is σ = 26638560. Its totient is φ = 12155976.

The previous prime is 18338011. The next prime is 18338083. The reversal of 18338013 is 31083381.

It is not a de Polignac number, because 18338013 - 2¹ = 18338011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18338011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4081 + ... + 7302.

It is an arithmetic number, because the mean of its divisors is an integer number (2219880).

Almost surely, 2^18338013 is an apocalyptic number.

It is an amenable number.

18338013 is a deficient number, since it is larger than the sum of its proper divisors (8300547).

18338013 is a wasteful number, since it uses less digits than its factorization.

18338013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11568 (or 11565 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18338013 is about 4282.2906253546. The cubic root of 18338013 is about 263.7044298829.

The spelling of 18338013 in words is "eighteen million, three hundred thirty-eight thousand, thirteen".