18417042 has 96 divisors (see below), whose sum is σ = 49296000. Its totient is φ = 4953312.

The previous prime is 18417031. The next prime is 18417067. The reversal of 18417042 is 24071481.

It is a junction number, because it is equal to n+sod(n) for n = 18416997 and 18417015.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117228 + ... + 117384.

It is an arithmetic number, because the mean of its divisors is an integer number (513500).

Almost surely, 2^18417042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18417042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24648000).

18417042 is an abundant number, since it is smaller than the sum of its proper divisors (30878958).

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

18417042 is a wasteful number, since it uses less digits than its factorization.

18417042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 18417042 is about 4291.5081265215. The cubic root of 18417042 is about 264.0827048041.

The spelling of 18417042 in words is "eighteen million, four hundred seventeen thousand, forty-two".