20823934771 has 2 divisors, whose sum is σ = 20823934772. Its totient is φ = 20823934770.

The previous prime is 20823934753. The next prime is 20823934861. The reversal of 20823934771 is 17743932802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20823934771 - 2⁷ = 20823934643 is a prime.

It is not a weakly prime, because it can be changed into another prime (20823934711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411967385 + 10411967386.

It is an arithmetic number, because the mean of its divisors is an integer number (10411967386).

Almost surely, 2^20823934771 is an apocalyptic number.

20823934771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20823934771 is an equidigital number, since it uses as much as digits as its factorization.

20823934771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 20823934771 in words is "twenty billion, eight hundred twenty-three million, nine hundred thirty-four thousand, seven hundred seventy-one".