18659442 has 16 divisors (see below), whose sum is σ = 37366272. Its totient is φ = 6211920.

The previous prime is 18659413. The next prime is 18659453. The reversal of 18659442 is 24495681.

It is a self number, because there is not a number n which added to its sum of digits gives 18659442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5092 + ... + 7952.

It is an arithmetic number, because the mean of its divisors is an integer number (2335392).

Almost surely, 2^18659442 is an apocalyptic number.

18659442 is an abundant number, since it is smaller than the sum of its proper divisors (18706830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18659442 is a wasteful number, since it uses less digits than its factorization.

18659442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953.

The product of its digits is 69120, while the sum is 39.

The square root of 18659442 is about 4319.6576253217. The cubic root of 18659442 is about 265.2362530603.

The spelling of 18659442 in words is "eighteen million, six hundred fifty-nine thousand, four hundred forty-two".