18811214908 has 6 divisors (see below), whose sum is σ = 32919626096. Its totient is φ = 9405607452.

The previous prime is 18811214893. The next prime is 18811214921. The reversal of 18811214908 is 80941211881.

It is a super-2 number, since 2×18811214908² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2351401860 + ... + 2351401867.

Almost surely, 2^18811214908 is an apocalyptic number.

It is an amenable number.

18811214908 is a deficient number, since it is larger than the sum of its proper divisors (14108411188).

18811214908 is a wasteful number, since it uses less digits than its factorization.

18811214908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702803731 (or 4702803729 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 43.

The spelling of 18811214908 in words is "eighteen billion, eight hundred eleven million, two hundred fourteen thousand, nine hundred eight".