20790571699 has 2 divisors, whose sum is σ = 20790571700. Its totient is φ = 20790571698.

The previous prime is 20790571687. The next prime is 20790571717. The reversal of 20790571699 is 99617509702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20790571699 - 2¹¹ = 20790569651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20790571619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10395285849 + 10395285850.

It is an arithmetic number, because the mean of its divisors is an integer number (10395285850).

Almost surely, 2^20790571699 is an apocalyptic number.

20790571699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20790571699 is an equidigital number, since it uses as much as digits as its factorization.

20790571699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2143260, while the sum is 55.

The spelling of 20790571699 in words is "twenty billion, seven hundred ninety million, five hundred seventy-one thousand, six hundred ninety-nine".