19689458807 has 2 divisors, whose sum is σ = 19689458808. Its totient is φ = 19689458806.

The previous prime is 19689458797. The next prime is 19689458839. The reversal of 19689458807 is 70885498691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19689458807 - 2⁶ = 19689458743 is a prime.

It is a super-2 number, since 2×19689458807² (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 (19689458707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9844729403 + 9844729404.

It is an arithmetic number, because the mean of its divisors is an integer number (9844729404).

Almost surely, 2^19689458807 is an apocalyptic number.

19689458807 is a deficient number, since it is larger than the sum of its proper divisors (1).

19689458807 is an equidigital number, since it uses as much as digits as its factorization.

19689458807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 65.

The spelling of 19689458807 in words is "nineteen billion, six hundred eighty-nine million, four hundred fifty-eight thousand, eight hundred seven".