18669042 has 80 divisors (see below), whose sum is σ = 48578112. Its totient is φ = 5248800.

The previous prime is 18669029. The next prime is 18669047. The reversal of 18669042 is 24096681.

It is a junction number, because it is equal to n+sod(n) for n = 18668988 and 18669006.

It is not an unprimeable number, because it can be changed into a prime (18669047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 114453 + ... + 114615.

Almost surely, 2^18669042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18669042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24289056).

18669042 is an abundant number, since it is smaller than the sum of its proper divisors (29909070).

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

18669042 is a wasteful number, since it uses less digits than its factorization.

18669042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 18669042 is about 4320.7686816121. The cubic root of 18669042 is about 265.2817319387.

The spelling of 18669042 in words is "eighteen million, six hundred sixty-nine thousand, forty-two".