19079426893 has 4 divisors (see below), whose sum is σ = 20201746140. Its totient is φ = 17957107648.

The previous prime is 19079426869. The next prime is 19079426921. The reversal of 19079426893 is 39862497091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39862497091 = 71 ⋅561443621.

It can be written as a sum of positive squares in 2 ways, for example, as 7771656649 + 11307770244 = 88157^2 + 106338^2 .

It is a cyclic number.

It is not a de Polignac number, because 19079426893 - 2²¹ = 19077329741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19079426393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561159598 + ... + 561159631.

It is an arithmetic number, because the mean of its divisors is an integer number (5050436535).

Almost surely, 2^19079426893 is an apocalyptic number.

It is an amenable number.

19079426893 is a deficient number, since it is larger than the sum of its proper divisors (1122319247).

19079426893 is a wasteful number, since it uses less digits than its factorization.

19079426893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122319246.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 19079426893 in words is "nineteen billion, seventy-nine million, four hundred twenty-six thousand, eight hundred ninety-three".