20295872279 has 2 divisors, whose sum is σ = 20295872280. Its totient is φ = 20295872278.

The previous prime is 20295872273. The next prime is 20295872351. The reversal of 20295872279 is 97227859202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20295872279 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20295872279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20295872273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10147936139 + 10147936140.

It is an arithmetic number, because the mean of its divisors is an integer number (10147936140).

Almost surely, 2^20295872279 is an apocalyptic number.

20295872279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20295872279 is an equidigital number, since it uses as much as digits as its factorization.

20295872279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 20295872279 in words is "twenty billion, two hundred ninety-five million, eight hundred seventy-two thousand, two hundred seventy-nine".