18343404 has 36 divisors (see below), whose sum is σ = 46506096. Its totient is φ = 6096288.

The previous prime is 18343393. The next prime is 18343421. The reversal of 18343404 is 40434381.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17602 + ... + 18614.

It is an arithmetic number, because the mean of its divisors is an integer number (1291836).

Almost surely, 2^18343404 is an apocalyptic number.

It is an amenable number.

18343404 is an abundant number, since it is smaller than the sum of its proper divisors (28162692).

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

18343404 is a wasteful number, since it uses less digits than its factorization.

18343404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1521 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 18343404 is about 4282.9200319408. The cubic root of 18343404 is about 263.7302685837.

Adding to 18343404 its reverse (40434381), we get a palindrome (58777785).

The spelling of 18343404 in words is "eighteen million, three hundred forty-three thousand, four hundred four".