20795924857 has 8 divisors (see below), whose sum is σ = 20878129152. Its totient is φ = 20713772400.

The previous prime is 20795924833. The next prime is 20795924867. The reversal of 20795924857 is 75842959702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20795924857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20795924867) 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 7 ways as a sum of consecutive naturals, for example, 922632 + ... + 944902.

It is an arithmetic number, because the mean of its divisors is an integer number (2609766144).

Almost surely, 2^20795924857 is an apocalyptic number.

It is an amenable number.

20795924857 is a deficient number, since it is larger than the sum of its proper divisors (82204295).

20795924857 is a wasteful number, since it uses less digits than its factorization.

20795924857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25919.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 20795924857 in words is "twenty billion, seven hundred ninety-five million, nine hundred twenty-four thousand, eight hundred fifty-seven".