18401304 has 16 divisors (see below), whose sum is σ = 46003320. Its totient is φ = 6133760.

The previous prime is 18401303. The next prime is 18401309. The reversal of 18401304 is 40310481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18401303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383337 + ... + 383384.

Almost surely, 2^18401304 is an apocalyptic number.

It is an amenable number.

18401304 is an abundant number, since it is smaller than the sum of its proper divisors (27602016).

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

18401304 is a wasteful number, since it uses less digits than its factorization.

18401304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766730 (or 766726 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 18401304 is about 4289.6741134963. The cubic root of 18401304 is about 264.0074607625.

Adding to 18401304 its reverse (40310481), we get a palindrome (58711785).

The spelling of 18401304 in words is "eighteen million, four hundred one thousand, three hundred four".