18916013208 has 32 divisors (see below), whose sum is σ = 47293815600. Its totient is φ = 6304833408.

The previous prime is 18916013173. The next prime is 18916013269. The reversal of 18916013208 is 80231061981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389610 + ... + 435462.

Almost surely, 2^18916013208 is an apocalyptic number.

It is an amenable number.

18916013208 is an abundant number, since it is smaller than the sum of its proper divisors (28377802392).

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

18916013208 is a wasteful number, since it uses less digits than its factorization.

18916013208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63051 (or 63047 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 18916013208 in words is "eighteen billion, nine hundred sixteen million, thirteen thousand, two hundred eight".