20963395157 has 2 divisors, whose sum is σ = 20963395158. Its totient is φ = 20963395156.

The previous prime is 20963395129. The next prime is 20963395183. The reversal of 20963395157 is 75159336902.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824113521 + 10139281636 = 104039^2 + 100694^2 .

It is a cyclic number.

It is not a de Polignac number, because 20963395157 - 2⁶ = 20963395093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20963394157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10481697578 + 10481697579.

It is an arithmetic number, because the mean of its divisors is an integer number (10481697579).

Almost surely, 2^20963395157 is an apocalyptic number.

It is an amenable number.

20963395157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20963395157 is an equidigital number, since it uses as much as digits as its factorization.

20963395157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1530900, while the sum is 50.

The spelling of 20963395157 in words is "twenty billion, nine hundred sixty-three million, three hundred ninety-five thousand, one hundred fifty-seven".