19249438117 has 16 divisors (see below), whose sum is σ = 24093175680. Its totient is φ = 14972179392.

The previous prime is 19249438081. The next prime is 19249438121. The reversal of 19249438117 is 71183494291.

It is a cyclic number.

It is not a de Polignac number, because 19249438117 - 2¹⁹ = 19248913829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19249438177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1787278 + ... + 1798015.

It is an arithmetic number, because the mean of its divisors is an integer number (1505823480).

Almost surely, 2^19249438117 is an apocalyptic number.

It is an amenable number.

19249438117 is a deficient number, since it is larger than the sum of its proper divisors (4843737563).

19249438117 is a wasteful number, since it uses less digits than its factorization.

19249438117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585372.

The product of its digits is 435456, while the sum is 49.

The spelling of 19249438117 in words is "nineteen billion, two hundred forty-nine million, four hundred thirty-eight thousand, one hundred seventeen".