18407204308 has 12 divisors (see below), whose sum is σ = 34107466932. Its totient is φ = 8662213760.

The previous prime is 18407204297. The next prime is 18407204311. The reversal of 18407204308 is 80340270481.

It can be written as a sum of positive squares in 2 ways, for example, as 11230064784 + 7177139524 = 105972^2 + 84718^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135347023 + ... + 135347158.

It is an arithmetic number, because the mean of its divisors is an integer number (2842288911).

Almost surely, 2^18407204308 is an apocalyptic number.

It is an amenable number.

18407204308 is a deficient number, since it is larger than the sum of its proper divisors (15700262624).

18407204308 is a wasteful number, since it uses less digits than its factorization.

18407204308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270694202 (or 270694200 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

Adding to 18407204308 its reverse (80340270481), we get a palindrome (98747474789).

The spelling of 18407204308 in words is "eighteen billion, four hundred seven million, two hundred four thousand, three hundred eight".