20354645279 has 2 divisors, whose sum is σ = 20354645280. Its totient is φ = 20354645278.

The previous prime is 20354645209. The next prime is 20354645303. The reversal of 20354645279 is 97254645302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20354645279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354645209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177322639 + 10177322640.

It is an arithmetic number, because the mean of its divisors is an integer number (10177322640).

Almost surely, 2^20354645279 is an apocalyptic number.

20354645279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354645279 is an equidigital number, since it uses as much as digits as its factorization.

20354645279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 20354645279 in words is "twenty billion, three hundred fifty-four million, six hundred forty-five thousand, two hundred seventy-nine".