18102242 has 16 divisors (see below), whose sum is σ = 28494720. Its totient is φ = 8608512.

The previous prime is 18102241. The next prime is 18102247. The reversal of 18102242 is 24220181.

It is a happy number.

It is a super-3 number, since 3×18102242³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18102241) 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, 7859 + ... + 9897.

It is an arithmetic number, because the mean of its divisors is an integer number (1780920).

Almost surely, 2^18102242 is an apocalyptic number.

18102242 is a deficient number, since it is larger than the sum of its proper divisors (10392478).

18102242 is a wasteful number, since it uses less digits than its factorization.

18102242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 18102242 is about 4254.6729604048. The cubic root of 18102242 is about 262.5694062880.

The spelling of 18102242 in words is "eighteen million, one hundred two thousand, two hundred forty-two".