18268257020657 has 8 divisors (see below), whose sum is σ = 20880500391936. Its totient is φ = 15656636741472.

The previous prime is 18268257020653. The next prime is 18268257020659. The reversal of 18268257020657 is 75602075286281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18268257020657 - 2² = 18268257020653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18268257020596 and 18268257020605.

It is not an unprimeable number, because it can be changed into a prime (18268257020653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155710193 + ... + 155827470.

It is an arithmetic number, because the mean of its divisors is an integer number (2610062548992).

Almost surely, 2^{18268257020657} is an apocalyptic number.

It is an amenable number.

18268257020657 is a deficient number, since it is larger than the sum of its proper divisors (2612243371279).

18268257020657 is an equidigital number, since it uses as much as digits as its factorization.

18268257020657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311546047.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 18268257020657 in words is "eighteen trillion, two hundred sixty-eight billion, two hundred fifty-seven million, twenty thousand, six hundred fifty-seven".