20857805753 has 2 divisors, whose sum is σ = 20857805754. Its totient is φ = 20857805752.

The previous prime is 20857805719. The next prime is 20857805777. The reversal of 20857805753 is 35750875802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17756095504 + 3101710249 = 133252^2 + 55693^2 .

It is a cyclic number.

It is not a de Polignac number, because 20857805753 - 2¹⁶ = 20857740217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20857805713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10428902876 + 10428902877.

It is an arithmetic number, because the mean of its divisors is an integer number (10428902877).

Almost surely, 2^20857805753 is an apocalyptic number.

It is an amenable number.

20857805753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20857805753 is an equidigital number, since it uses as much as digits as its factorization.

20857805753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 20857805753 in words is "twenty billion, eight hundred fifty-seven million, eight hundred five thousand, seven hundred fifty-three".