19243400093 has 4 divisors (see below), whose sum is σ = 19254454908. Its totient is φ = 19232345280.

The previous prime is 19243400027. The next prime is 19243400107. The reversal of 19243400093 is 39000434291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1924313689 + 17319086404 = 43867^2 + 131602^2 .

It is a cyclic number.

It is not a de Polignac number, because 19243400093 - 2¹⁶ = 19243334557 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 (19243400023) 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, 5524796 + ... + 5528277.

It is an arithmetic number, because the mean of its divisors is an integer number (4813613727).

Almost surely, 2^19243400093 is an apocalyptic number.

It is an amenable number.

19243400093 is a deficient number, since it is larger than the sum of its proper divisors (11054815).

19243400093 is a wasteful number, since it uses less digits than its factorization.

19243400093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11054814.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 19243400093 in words is "nineteen billion, two hundred forty-three million, four hundred thousand, ninety-three".