20848633142057 has 4 divisors (see below), whose sum is σ = 23827009305216. Its totient is φ = 17870256978900.

The previous prime is 20848633142023. The next prime is 20848633142089. The reversal of 20848633142057 is 75024133684802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20848633142057 - 2²⁴ = 20848616364841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20848633112057) 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, 1489188081569 + ... + 1489188081582.

It is an arithmetic number, because the mean of its divisors is an integer number (5956752326304).

Almost surely, 2^{20848633142057} is an apocalyptic number.

It is an amenable number.

20848633142057 is a deficient number, since it is larger than the sum of its proper divisors (2978376163159).

20848633142057 is an equidigital number, since it uses as much as digits as its factorization.

20848633142057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978376163158.

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 20848633142057 in words is "twenty trillion, eight hundred forty-eight billion, six hundred thirty-three million, one hundred forty-two thousand, fifty-seven".