18442959 has 4 divisors (see below), whose sum is σ = 24590616. Its totient is φ = 12295304.

The previous prime is 18442891. The next prime is 18442967. The reversal of 18442959 is 95924481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95924481 = 3 ⋅31974827.

It is a cyclic number.

It is not a de Polignac number, because 18442959 - 2¹⁵ = 18410191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18442959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442969) 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, 3073824 + ... + 3073829.

It is an arithmetic number, because the mean of its divisors is an integer number (6147654).

Almost surely, 2^18442959 is an apocalyptic number.

18442959 is a deficient number, since it is larger than the sum of its proper divisors (6147657).

18442959 is an equidigital number, since it uses as much as digits as its factorization.

18442959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6147656.

The product of its digits is 103680, while the sum is 42.

The square root of 18442959 is about 4294.5266328200. The cubic root of 18442959 is about 264.2065217106.

The spelling of 18442959 in words is "eighteen million, four hundred forty-two thousand, nine hundred fifty-nine".