20966530699 has 2 divisors, whose sum is σ = 20966530700. Its totient is φ = 20966530698.

The previous prime is 20966530681. The next prime is 20966530727. The reversal of 20966530699 is 99603566902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20966530699 - 2¹¹ = 20966528651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20966530619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10483265349 + 10483265350.

It is an arithmetic number, because the mean of its divisors is an integer number (10483265350).

Almost surely, 2^20966530699 is an apocalyptic number.

20966530699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20966530699 is an equidigital number, since it uses as much as digits as its factorization.

20966530699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4723920, while the sum is 55.

The spelling of 20966530699 in words is "twenty billion, nine hundred sixty-six million, five hundred thirty thousand, six hundred ninety-nine".