18340404 has 24 divisors (see below), whose sum is σ = 43021440. Its totient is φ = 6081024.

The previous prime is 18340397. The next prime is 18340409. The reversal of 18340404 is 40404381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1644 + ... + 6275.

It is an arithmetic number, because the mean of its divisors is an integer number (1792560).

Almost surely, 2^18340404 is an apocalyptic number.

It is an amenable number.

18340404 is an abundant number, since it is smaller than the sum of its proper divisors (24681036).

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

18340404 is a wasteful number, since it uses less digits than its factorization.

18340404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8119 (or 8117 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 18340404 is about 4282.5697892737. The cubic root of 18340404 is about 263.7158904101.

Adding to 18340404 its reverse (40404381), we get a palindrome (58744785).

The spelling of 18340404 in words is "eighteen million, three hundred forty thousand, four hundred four".