18057667499 has 4 divisors (see below), whose sum is σ = 18363729720. Its totient is φ = 17751605280.

The previous prime is 18057667489. The next prime is 18057667501. The reversal of 18057667499 is 99476675081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18057667499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18057667409) 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, 153031022 + ... + 153031139.

It is an arithmetic number, because the mean of its divisors is an integer number (4590932430).

Almost surely, 2^18057667499 is an apocalyptic number.

18057667499 is a deficient number, since it is larger than the sum of its proper divisors (306062221).

18057667499 is an equidigital number, since it uses as much as digits as its factorization.

18057667499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306062220.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 18057667499 in words is "eighteen billion, fifty-seven million, six hundred sixty-seven thousand, four hundred ninety-nine".