20117504763959 has 2 divisors, whose sum is σ = 20117504763960. Its totient is φ = 20117504763958.

The previous prime is 20117504763893. The next prime is 20117504763973. The reversal of 20117504763959 is 95936740571102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20117504763959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20117504763898 and 20117504763907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20117504763659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058752381979 + 10058752381980.

It is an arithmetic number, because the mean of its divisors is an integer number (10058752381980).

Almost surely, 2^{20117504763959} is an apocalyptic number.

20117504763959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117504763959 is an equidigital number, since it uses as much as digits as its factorization.

20117504763959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 59.

The spelling of 20117504763959 in words is "twenty trillion, one hundred seventeen billion, five hundred four million, seven hundred sixty-three thousand, nine hundred fifty-nine".