20757688199 has 2 divisors, whose sum is σ = 20757688200. Its totient is φ = 20757688198.

The previous prime is 20757688187. The next prime is 20757688247. The reversal of 20757688199 is 99188675702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20757688199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20757688099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10378844099 + 10378844100.

It is an arithmetic number, because the mean of its divisors is an integer number (10378844100).

Almost surely, 2^20757688199 is an apocalyptic number.

20757688199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20757688199 is an equidigital number, since it uses as much as digits as its factorization.

20757688199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 62.

The spelling of 20757688199 in words is "twenty billion, seven hundred fifty-seven million, six hundred eighty-eight thousand, one hundred ninety-nine".