20966883599 has 2 divisors, whose sum is σ = 20966883600. Its totient is φ = 20966883598.

The previous prime is 20966883569. The next prime is 20966883611. The reversal of 20966883599 is 99538866902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20966883599 is a prime.

It is a super-2 number, since 2×20966883599² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20966883569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10483441799 + 10483441800.

It is an arithmetic number, because the mean of its divisors is an integer number (10483441800).

Almost surely, 2^20966883599 is an apocalyptic number.

20966883599 is a deficient number, since it is larger than the sum of its proper divisors (1).

20966883599 is an equidigital number, since it uses as much as digits as its factorization.

20966883599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50388480, while the sum is 65.

The spelling of 20966883599 in words is "twenty billion, nine hundred sixty-six million, eight hundred eighty-three thousand, five hundred ninety-nine".