18868499668 has 12 divisors (see below), whose sum is σ = 33042150400. Its totient is φ = 9427885272.

The previous prime is 18868499653. The next prime is 18868499723. The reversal of 18868499668 is 86699486881.

It is a super-2 number, since 2×18868499668² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18868499668.

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, 1584468 + ... + 1596331.

Almost surely, 2^18868499668 is an apocalyptic number.

It is an amenable number.

18868499668 is a deficient number, since it is larger than the sum of its proper divisors (14173650732).

18868499668 is a wasteful number, since it uses less digits than its factorization.

18868499668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182286 (or 3182284 counting only the distinct ones).

The product of its digits is 286654464, while the sum is 73.

The spelling of 18868499668 in words is "eighteen billion, eight hundred sixty-eight million, four hundred ninety-nine thousand, six hundred sixty-eight".