20634514163 has 2 divisors, whose sum is σ = 20634514164. Its totient is φ = 20634514162.

The previous prime is 20634514091. The next prime is 20634514169. The reversal of 20634514163 is 36141543602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20634514163 - 2²⁴ = 20617736947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20634514169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10317257081 + 10317257082.

It is an arithmetic number, because the mean of its divisors is an integer number (10317257082).

Almost surely, 2^20634514163 is an apocalyptic number.

20634514163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20634514163 is an equidigital number, since it uses as much as digits as its factorization.

20634514163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 20634514163 in words is "twenty billion, six hundred thirty-four million, five hundred fourteen thousand, one hundred sixty-three".