16818004 has 24 divisors (see below), whose sum is σ = 33784128. Its totient is φ = 7176000.

The previous prime is 16818001. The next prime is 16818023. The reversal of 16818004 is 40081861.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16818001) 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, 5832 + ... + 8224.

It is an arithmetic number, because the mean of its divisors is an integer number (1407672).

Almost surely, 2^16818004 is an apocalyptic number.

16818004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16818004 is an abundant number, since it is smaller than the sum of its proper divisors (16966124).

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

16818004 is a wasteful number, since it uses less digits than its factorization.

16818004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655 (or 2653 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 16818004 is about 4100.9759813976. The cubic root of 16818004 is about 256.2072906016.

Adding to 16818004 its reverse (40081861), we get a palindrome (56899865).

The spelling of 16818004 in words is "sixteen million, eight hundred eighteen thousand, four".