20569642019 has 2 divisors, whose sum is σ = 20569642020. Its totient is φ = 20569642018.

The previous prime is 20569642007. The next prime is 20569642021. The reversal of 20569642019 is 91024696502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20569642019 - 2¹⁶ = 20569576483 is a prime.

It is a super-2 number, since 2×20569642019² (a number of 21 digits) contains 22 as substring.

Together with 20569642021, 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 (20569641019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10284821009 + 10284821010.

It is an arithmetic number, because the mean of its divisors is an integer number (10284821010).

Almost surely, 2^20569642019 is an apocalyptic number.

20569642019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20569642019 is an equidigital number, since it uses as much as digits as its factorization.

20569642019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 20569642019 in words is "twenty billion, five hundred sixty-nine million, six hundred forty-two thousand, nineteen".