18642013327857 has 16 divisors (see below), whose sum is σ = 26164423712000. Its totient is φ = 11773815638544.

The previous prime is 18642013327807. The next prime is 18642013327919. The reversal of 18642013327857 is 75872331024681.

It is a happy number.

It is not a de Polignac number, because 18642013327857 - 2⁸ = 18642013327601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18642013327797 and 18642013327806.

It is not an unprimeable number, because it can be changed into a prime (18642013327807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7003494 + ... + 9291552.

It is an arithmetic number, because the mean of its divisors is an integer number (1635276482000).

Almost surely, 2^{18642013327857} is an apocalyptic number.

It is an amenable number.

18642013327857 is a deficient number, since it is larger than the sum of its proper divisors (7522410384143).

18642013327857 is a wasteful number, since it uses less digits than its factorization.

18642013327857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431020.

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 18642013327857 in words is "eighteen trillion, six hundred forty-two billion, thirteen million, three hundred twenty-seven thousand, eight hundred fifty-seven".