20798353799 has 2 divisors, whose sum is σ = 20798353800. Its totient is φ = 20798353798.

The previous prime is 20798353733. The next prime is 20798353811. The reversal of 20798353799 is 99735389702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20798353799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20798353399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399176899 + 10399176900.

It is an arithmetic number, because the mean of its divisors is an integer number (10399176900).

Almost surely, 2^20798353799 is an apocalyptic number.

20798353799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20798353799 is an equidigital number, since it uses as much as digits as its factorization.

20798353799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25719120, while the sum is 62.

The spelling of 20798353799 in words is "twenty billion, seven hundred ninety-eight million, three hundred fifty-three thousand, seven hundred ninety-nine".