18353379208 has 8 divisors (see below), whose sum is σ = 34412586030. Its totient is φ = 9176689600.

The previous prime is 18353379193. The next prime is 18353379271. The reversal of 18353379208 is 80297335381.

It can be written as a sum of positive squares in only one way, i.e., 17934030724 + 419348484 = 133918^2 + 20478^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1147086193 + ... + 1147086208.

Almost surely, 2^18353379208 is an apocalyptic number.

It is an amenable number.

18353379208 is a deficient number, since it is larger than the sum of its proper divisors (16059206822).

18353379208 is a wasteful number, since it uses less digits than its factorization.

18353379208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294172407 (or 2294172403 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 18353379208 in words is "eighteen billion, three hundred fifty-three million, three hundred seventy-nine thousand, two hundred eight".