20634813763 has 2 divisors, whose sum is σ = 20634813764. Its totient is φ = 20634813762.

The previous prime is 20634813761. The next prime is 20634813841. The reversal of 20634813763 is 36731843602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20634813763 - 2¹ = 20634813761 is a prime.

Together with 20634813761, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20634813761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10317406881 + 10317406882.

It is an arithmetic number, because the mean of its divisors is an integer number (10317406882).

Almost surely, 2^20634813763 is an apocalyptic number.

20634813763 is a deficient number, since it is larger than the sum of its proper divisors (1).

20634813763 is an equidigital number, since it uses as much as digits as its factorization.

20634813763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 20634813763 in words is "twenty billion, six hundred thirty-four million, eight hundred thirteen thousand, seven hundred sixty-three".