20566714967 has 2 divisors, whose sum is σ = 20566714968. Its totient is φ = 20566714966.

The previous prime is 20566714907. The next prime is 20566714981. The reversal of 20566714967 is 76941766502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20566714967 - 2²⁸ = 20298279511 is a prime.

It is a super-2 number, since 2×20566714967² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20566714907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10283357483 + 10283357484.

It is an arithmetic number, because the mean of its divisors is an integer number (10283357484).

Almost surely, 2^20566714967 is an apocalyptic number.

20566714967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20566714967 is an equidigital number, since it uses as much as digits as its factorization.

20566714967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 20566714967 in words is "twenty billion, five hundred sixty-six million, seven hundred fourteen thousand, nine hundred sixty-seven".