18150857519 has 4 divisors (see below), whose sum is σ = 18215451600. Its totient is φ = 18086263440.

The previous prime is 18150857509. The next prime is 18150857533. The reversal of 18150857519 is 91575805181.

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

It is a cyclic number.

It is not a de Polignac number, because 18150857519 - 2⁴ = 18150857503 is a prime.

It is a super-2 number, since 2×18150857519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18150857509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32296619 + ... + 32297180.

It is an arithmetic number, because the mean of its divisors is an integer number (4553862900).

Almost surely, 2^18150857519 is an apocalyptic number.

18150857519 is a deficient number, since it is larger than the sum of its proper divisors (64594081).

18150857519 is an equidigital number, since it uses as much as digits as its factorization.

18150857519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64594080.

The product of its (nonzero) digits is 504000, while the sum is 50.

The spelling of 18150857519 in words is "eighteen billion, one hundred fifty million, eight hundred fifty-seven thousand, five hundred nineteen".