18841004 has 48 divisors (see below), whose sum is σ = 40943616. Its totient is φ = 7387200.

The previous prime is 18840967. The next prime is 18841019. The reversal of 18841004 is 40014881.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 69389 + ... + 69659.

It is an arithmetic number, because the mean of its divisors is an integer number (852992).

Almost surely, 2^18841004 is an apocalyptic number.

18841004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18841004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20471808).

18841004 is an abundant number, since it is smaller than the sum of its proper divisors (22102612).

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

18841004 is a wasteful number, since it uses less digits than its factorization.

18841004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 18841004 is about 4340.6225359964. The cubic root of 18841004 is about 266.0937540510.

Adding to 18841004 its reverse (40014881), we get a palindrome (58855885).

The spelling of 18841004 in words is "eighteen million, eight hundred forty-one thousand, four".