18393887884 has 12 divisors (see below), whose sum is σ = 33299280000. Its totient is φ = 8879807888.

The previous prime is 18393887873. The next prime is 18393887893. The reversal of 18393887884 is 48878839381.

It is a super-2 number, since 2×18393887884² (a number of 21 digits) contains 22 as substring.

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, 79283884 + ... + 79284115.

It is an arithmetic number, because the mean of its divisors is an integer number (2774940000).

Almost surely, 2^18393887884 is an apocalyptic number.

It is an amenable number.

18393887884 is a deficient number, since it is larger than the sum of its proper divisors (14905392116).

18393887884 is a wasteful number, since it uses less digits than its factorization.

18393887884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158568032 (or 158568030 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 67.

The spelling of 18393887884 in words is "eighteen billion, three hundred ninety-three million, eight hundred eighty-seven thousand, eight hundred eighty-four".