18107988956 has 12 divisors (see below), whose sum is σ = 32711206080. Its totient is φ = 8761930080.

The previous prime is 18107988917. The next prime is 18107988971. The reversal of 18107988956 is 65988970181.

It is a Harshad number since it is a multiple of its sum of digits (62).

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, 73015961 + ... + 73016208.

It is an arithmetic number, because the mean of its divisors is an integer number (2725933840).

Almost surely, 2^18107988956 is an apocalyptic number.

It is an amenable number.

18107988956 is a deficient number, since it is larger than the sum of its proper divisors (14603217124).

18107988956 is a wasteful number, since it uses less digits than its factorization.

18107988956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146032204 (or 146032202 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 62.

The spelling of 18107988956 in words is "eighteen billion, one hundred seven million, nine hundred eighty-eight thousand, nine hundred fifty-six".