18299904 has 176 divisors, whose sum is σ = 59739648. Its totient is φ = 4866048.

The previous prime is 18299903. The next prime is 18299947. The reversal of 18299904 is 40999281.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18299903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494574 + ... + 494610.

Almost surely, 2^18299904 is an apocalyptic number.

18299904 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 18299904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29869824).

18299904 is an abundant number, since it is smaller than the sum of its proper divisors (41439744).

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

18299904 is a wasteful number, since it uses less digits than its factorization.

18299904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 18299904 is about 4277.8387066368. The cubic root of 18299904 is about 263.5216314230.

The spelling of 18299904 in words is "eighteen million, two hundred ninety-nine thousand, nine hundred four".