18300836691 has 12 divisors (see below), whose sum is σ = 26668477368. Its totient is φ = 12092587584.

The previous prime is 18300836683. The next prime is 18300836717. The reversal of 18300836691 is 19663800381.

It is a happy number.

It is not a de Polignac number, because 18300836691 - 2³ = 18300836683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18300836611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8996445 + ... + 8998478.

It is an arithmetic number, because the mean of its divisors is an integer number (2222373114).

Almost surely, 2^18300836691 is an apocalyptic number.

18300836691 is a deficient number, since it is larger than the sum of its proper divisors (8367640677).

18300836691 is a wasteful number, since it uses less digits than its factorization.

18300836691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17995042 (or 17995039 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 18300836691 in words is "eighteen billion, three hundred million, eight hundred thirty-six thousand, six hundred ninety-one".