20309868967 has 2 divisors, whose sum is σ = 20309868968. Its totient is φ = 20309868966.

The previous prime is 20309868947. The next prime is 20309868973. The reversal of 20309868967 is 76986890302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20309868967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20309868947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10154934483 + 10154934484.

It is an arithmetic number, because the mean of its divisors is an integer number (10154934484).

Almost surely, 2^20309868967 is an apocalyptic number.

20309868967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20309868967 is an equidigital number, since it uses as much as digits as its factorization.

20309868967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 20309868967 in words is "twenty billion, three hundred nine million, eight hundred sixty-eight thousand, nine hundred sixty-seven".