20085992279 has 2 divisors, whose sum is σ = 20085992280. Its totient is φ = 20085992278.

The previous prime is 20085992263. The next prime is 20085992317. The reversal of 20085992279 is 97229958002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20085992279 - 2⁴ = 20085992263 is a prime.

It is a super-2 number, since 2×20085992279² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20085992279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20085992249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042996139 + 10042996140.

It is an arithmetic number, because the mean of its divisors is an integer number (10042996140).

Almost surely, 2^20085992279 is an apocalyptic number.

20085992279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085992279 is an equidigital number, since it uses as much as digits as its factorization.

20085992279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 20085992279 in words is "twenty billion, eighty-five million, nine hundred ninety-two thousand, two hundred seventy-nine".