18268042 has 16 divisors (see below), whose sum is σ = 30231432. Its totient is φ = 8225280.

The previous prime is 18268009. The next prime is 18268043. The reversal of 18268042 is 24086281.

It can be written as a sum of positive squares in 4 ways, for example, as 2099601 + 16168441 = 1449^2 + 4021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18267995 and 18268013.

It is not an unprimeable number, because it can be changed into a prime (18268043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7503 + ... + 9634.

Almost surely, 2^18268042 is an apocalyptic number.

18268042 is a deficient number, since it is larger than the sum of its proper divisors (11963390).

18268042 is a wasteful number, since it uses less digits than its factorization.

18268042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17193.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 18268042 is about 4274.1130073970. The cubic root of 18268042 is about 263.3686032269.

The spelling of 18268042 in words is "eighteen million, two hundred sixty-eight thousand, forty-two".