18343604 has 18 divisors (see below), whose sum is σ = 33561570. Its totient is φ = 8772016.

The previous prime is 18343571. The next prime is 18343609. The reversal of 18343604 is 40634381.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 3055504 = 3910^2 + 1748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2219 + ... + 6450.

Almost surely, 2^18343604 is an apocalyptic number.

It is an amenable number.

18343604 is a deficient number, since it is larger than the sum of its proper divisors (15217966).

18343604 is a wasteful number, since it uses less digits than its factorization.

18343604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8719 (or 8694 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 18343604 is about 4282.9433804336. The cubic root of 18343604 is about 263.7312270729.

Adding to 18343604 its reverse (40634381), we get a palindrome (58977985).

The spelling of 18343604 in words is "eighteen million, three hundred forty-three thousand, six hundred four".