19004475893 has 16 divisors (see below), whose sum is σ = 20719767600. Its totient is φ = 17325834240.

The previous prime is 19004475883. The next prime is 19004475911. The reversal of 19004475893 is 39857440091.

It can be written as a sum of positive squares in 8 ways, for example, as 9823386769 + 9181089124 = 99113^2 + 95818^2 .

It is not a de Polignac number, because 19004475893 - 2⁴ = 19004475877 is a prime.

It is a super-2 number, since 2×19004475893² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19004475863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066013 + ... + 1083693.

It is an arithmetic number, because the mean of its divisors is an integer number (1294985475).

Almost surely, 2^19004475893 is an apocalyptic number.

19004475893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19004475893 is a deficient number, since it is larger than the sum of its proper divisors (1715291707).

19004475893 is a wasteful number, since it uses less digits than its factorization.

19004475893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18712.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 19004475893 in words is "nineteen billion, four million, four hundred seventy-five thousand, eight hundred ninety-three".