19868047769 has 2 divisors, whose sum is σ = 19868047770. Its totient is φ = 19868047768.

The previous prime is 19868047763. The next prime is 19868047799. The reversal of 19868047769 is 96774086891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19849428544 + 18619225 = 140888^2 + 4315^2 .

It is a cyclic number.

It is not a de Polignac number, because 19868047769 - 2⁴ = 19868047753 is a prime.

It is a super-2 number, since 2×19868047769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19868047763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9934023884 + 9934023885.

It is an arithmetic number, because the mean of its divisors is an integer number (9934023885).

Almost surely, 2^19868047769 is an apocalyptic number.

It is an amenable number.

19868047769 is a deficient number, since it is larger than the sum of its proper divisors (1).

19868047769 is an equidigital number, since it uses as much as digits as its factorization.

19868047769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 19868047769 in words is "nineteen billion, eight hundred sixty-eight million, forty-seven thousand, seven hundred sixty-nine".