19885941469 has 2 divisors, whose sum is σ = 19885941470. Its totient is φ = 19885941468.

The previous prime is 19885941433. The next prime is 19885941529. The reversal of 19885941469 is 96414958891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11435735844 + 8450205625 = 106938^2 + 91925^2 .

It is a cyclic number.

It is not a de Polignac number, because 19885941469 - 2²⁷ = 19751723741 is a prime.

It is a super-2 number, since 2×19885941469² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19885941469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19885941419) 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, 9942970734 + 9942970735.

It is an arithmetic number, because the mean of its divisors is an integer number (9942970735).

Almost surely, 2^19885941469 is an apocalyptic number.

It is an amenable number.

19885941469 is a deficient number, since it is larger than the sum of its proper divisors (1).

19885941469 is an equidigital number, since it uses as much as digits as its factorization.

19885941469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 64.

The spelling of 19885941469 in words is "nineteen billion, eight hundred eighty-five million, nine hundred forty-one thousand, four hundred sixty-nine".