20868964019 has 2 divisors, whose sum is σ = 20868964020. Its totient is φ = 20868964018.

The previous prime is 20868964007. The next prime is 20868964099. The reversal of 20868964019 is 91046986802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20868964019 - 2⁸ = 20868963763 is a prime.

It is a super-2 number, since 2×20868964019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20868964099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10434482009 + 10434482010.

It is an arithmetic number, because the mean of its divisors is an integer number (10434482010).

Almost surely, 2^20868964019 is an apocalyptic number.

20868964019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20868964019 is an equidigital number, since it uses as much as digits as its factorization.

20868964019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 20868964019 in words is "twenty billion, eight hundred sixty-eight million, nine hundred sixty-four thousand, nineteen".