18682787984 has 20 divisors (see below), whose sum is σ = 41369030784. Its totient is φ = 8006909088.

The previous prime is 18682787971. The next prime is 18682787987. The reversal of 18682787984 is 48978728681.

It is not an unprimeable number, because it can be changed into a prime (18682787987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83405192 + ... + 83405415.

Almost surely, 2^18682787984 is an apocalyptic number.

18682787984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18682787984 is an abundant number, since it is smaller than the sum of its proper divisors (22686242800).

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

18682787984 is a wasteful number, since it uses less digits than its factorization.

18682787984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166810622 (or 166810616 counting only the distinct ones).

The product of its digits is 86704128, while the sum is 68.

The spelling of 18682787984 in words is "eighteen billion, six hundred eighty-two million, seven hundred eighty-seven thousand, nine hundred eighty-four".