18081192857 has 32 divisors (see below), whose sum is σ = 22750543872. Its totient is φ = 13987278144.

The previous prime is 18081192853. The next prime is 18081192859. The reversal of 18081192857 is 75829118081.

It is not a de Polignac number, because 18081192857 - 2² = 18081192853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18081192853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6358478 + ... + 6361320.

It is an arithmetic number, because the mean of its divisors is an integer number (710954496).

Almost surely, 2^18081192857 is an apocalyptic number.

It is an amenable number.

18081192857 is a deficient number, since it is larger than the sum of its proper divisors (4669351015).

18081192857 is a wasteful number, since it uses less digits than its factorization.

18081192857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397.

The product of its (nonzero) digits is 322560, while the sum is 50.

The spelling of 18081192857 in words is "eighteen billion, eighty-one million, one hundred ninety-two thousand, eight hundred fifty-seven".