18282642 has 32 divisors (see below), whose sum is σ = 42384384. Its totient is φ = 5149200.

The previous prime is 18282623. The next prime is 18282661. The reversal of 18282642 is 24628281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18282623) and next prime (18282661).

It is a super-3 number, since 3×18282642³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84 + ... + 6047.

It is an arithmetic number, because the mean of its divisors is an integer number (1324512).

Almost surely, 2^18282642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18282642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21192192).

18282642 is an abundant number, since it is smaller than the sum of its proper divisors (24101742).

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

18282642 is a wasteful number, since it uses less digits than its factorization.

18282642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214.

The product of its digits is 12288, while the sum is 33.

The square root of 18282642 is about 4275.8206229916. The cubic root of 18282642 is about 263.4387468086.

The spelling of 18282642 in words is "eighteen million, two hundred eighty-two thousand, six hundred forty-two".