18842004 has 48 divisors (see below), whose sum is σ = 49694400. Its totient is φ = 6172128.

The previous prime is 18842003. The next prime is 18842009. The reversal of 18842004 is 40024881.

It is a super-2 number, since 2×18842004² = 710042229472032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18842003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4894 + ... + 7850.

It is an arithmetic number, because the mean of its divisors is an integer number (1035300).

Almost surely, 2^18842004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18842004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24847200).

18842004 is an abundant number, since it is smaller than the sum of its proper divisors (30852396).

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

18842004 is a wasteful number, since it uses less digits than its factorization.

18842004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 18842004 is about 4340.7377253181. The cubic root of 18842004 is about 266.0984616743.

Adding to 18842004 its reverse (40024881), we get a palindrome (58866885).

The spelling of 18842004 in words is "eighteen million, eight hundred forty-two thousand, four".