18013359 has 16 divisors (see below), whose sum is σ = 29560832. Its totient is φ = 9501408.

The previous prime is 18013357. The next prime is 18013367. The reversal of 18013359 is 95331081.

It is a happy number.

It is not a de Polignac number, because 18013359 - 2¹ = 18013357 is a prime.

It is a super-2 number, since 2×18013359² = 648962204925762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32719 + ... + 33264.

It is an arithmetic number, because the mean of its divisors is an integer number (1847552).

Almost surely, 2^18013359 is an apocalyptic number.

18013359 is a deficient number, since it is larger than the sum of its proper divisors (11547473).

18013359 is a wasteful number, since it uses less digits than its factorization.

18013359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66006.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 18013359 is about 4244.2147683641. The cubic root of 18013359 is about 262.1389576184.

The spelling of 18013359 in words is "eighteen million, thirteen thousand, three hundred fifty-nine".