19994122469 has 2 divisors, whose sum is σ = 19994122470. Its totient is φ = 19994122468.

The previous prime is 19994122451. The next prime is 19994122487. The reversal of 19994122469 is 96422149991.

It is a balanced prime because it is at equal distance from previous prime (19994122451) and next prime (19994122487).

It can be written as a sum of positive squares in only one way, i.e., 17712149569 + 2281972900 = 133087^2 + 47770^2 .

It is a cyclic number.

It is not a de Polignac number, because 19994122469 - 2¹² = 19994118373 is a prime.

It is a super-2 number, since 2×19994122469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19994127469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9997061234 + 9997061235.

It is an arithmetic number, because the mean of its divisors is an integer number (9997061235).

Almost surely, 2^19994122469 is an apocalyptic number.

It is an amenable number.

19994122469 is a deficient number, since it is larger than the sum of its proper divisors (1).

19994122469 is an equidigital number, since it uses as much as digits as its factorization.

19994122469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The spelling of 19994122469 in words is "nineteen billion, nine hundred ninety-four million, one hundred twenty-two thousand, four hundred sixty-nine".