20157891709363 has 2 divisors, whose sum is σ = 20157891709364. Its totient is φ = 20157891709362.

The previous prime is 20157891709243. The next prime is 20157891709367. The reversal of 20157891709363 is 36390719875102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20157891709363 is a prime.

It is not a weakly prime, because it can be changed into another prime (20157891709367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078945854681 + 10078945854682.

It is an arithmetic number, because the mean of its divisors is an integer number (10078945854682).

Almost surely, 2^{20157891709363} is an apocalyptic number.

20157891709363 is a deficient number, since it is larger than the sum of its proper divisors (1).

20157891709363 is an equidigital number, since it uses as much as digits as its factorization.

20157891709363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 61.

The spelling of 20157891709363 in words is "twenty trillion, one hundred fifty-seven billion, eight hundred ninety-one million, seven hundred nine thousand, three hundred sixty-three".