18605042 has 4 divisors (see below), whose sum is σ = 27907566. Its totient is φ = 9302520.

The previous prime is 18605003. The next prime is 18605051. The reversal of 18605042 is 24050681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24050681 = 79 ⋅304439.

It can be written as a sum of positive squares in only one way, i.e., 17397241 + 1207801 = 4171^2 + 1099^2 .

It is a super-2 number, since 2×18605042² = 692295175643528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4651259 + ... + 4651262.

Almost surely, 2^18605042 is an apocalyptic number.

18605042 is a deficient number, since it is larger than the sum of its proper divisors (9302524).

18605042 is an equidigital number, since it uses as much as digits as its factorization.

18605042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302523.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 18605042 is about 4313.3562338393. The cubic root of 18605042 is about 264.9782443277.

The spelling of 18605042 in words is "eighteen million, six hundred five thousand, forty-two".