20769776219 has 2 divisors, whose sum is σ = 20769776220. Its totient is φ = 20769776218.

The previous prime is 20769776213. The next prime is 20769776221. The reversal of 20769776219 is 91267796702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20769776219 - 2²⁰ = 20768727643 is a prime.

It is a super-2 number, since 2×20769776219² (a number of 21 digits) contains 22 as substring.

Together with 20769776221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20769776213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384888109 + 10384888110.

It is an arithmetic number, because the mean of its divisors is an integer number (10384888110).

Almost surely, 2^20769776219 is an apocalyptic number.

20769776219 is a deficient number, since it is larger than the sum of its proper divisors (1).

20769776219 is an equidigital number, since it uses as much as digits as its factorization.

20769776219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The spelling of 20769776219 in words is "twenty billion, seven hundred sixty-nine million, seven hundred seventy-six thousand, two hundred nineteen".