19122143869 has 2 divisors, whose sum is σ = 19122143870. Its totient is φ = 19122143868.

The previous prime is 19122143849. The next prime is 19122143897. The reversal of 19122143869 is 96834122191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15168878244 + 3953265625 = 123162^2 + 62875^2 .

It is a cyclic number.

It is not a de Polignac number, because 19122143869 - 2⁷ = 19122143741 is a prime.

It is a super-2 number, since 2×19122143869² (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 (19122143809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9561071934 + 9561071935.

It is an arithmetic number, because the mean of its divisors is an integer number (9561071935).

Almost surely, 2^19122143869 is an apocalyptic number.

It is an amenable number.

19122143869 is a deficient number, since it is larger than the sum of its proper divisors (1).

19122143869 is an equidigital number, since it uses as much as digits as its factorization.

19122143869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The spelling of 19122143869 in words is "nineteen billion, one hundred twenty-two million, one hundred forty-three thousand, eight hundred sixty-nine".