19079426869 has 2 divisors, whose sum is σ = 19079426870. Its totient is φ = 19079426868.

The previous prime is 19079426867. The next prime is 19079426921. The reversal of 19079426869 is 96862497091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10085180625 + 8994246244 = 100425^2 + 94838^2 .

It is a cyclic number.

It is not a de Polignac number, because 19079426869 - 2¹ = 19079426867 is a prime.

It is a super-2 number, since 2×19079426869² (a number of 21 digits) contains 22 as substring.

Together with 19079426867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19079426867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9539713434 + 9539713435.

It is an arithmetic number, because the mean of its divisors is an integer number (9539713435).

Almost surely, 2^19079426869 is an apocalyptic number.

It is an amenable number.

19079426869 is a deficient number, since it is larger than the sum of its proper divisors (1).

19079426869 is an equidigital number, since it uses as much as digits as its factorization.

19079426869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 19079426869 in words is "nineteen billion, seventy-nine million, four hundred twenty-six thousand, eight hundred sixty-nine".