19433916893 has 8 divisors (see below), whose sum is σ = 19910431800. Its totient is φ = 18957521920.

The previous prime is 19433916883. The next prime is 19433916947. The reversal of 19433916893 is 39861933491.

It can be written as a sum of positive squares in 4 ways, for example, as 20232004 + 19413684889 = 4498^2 + 139333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19433916893 - 2⁸ = 19433916637 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 (19433916883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359183 + ... + 409731.

It is an arithmetic number, because the mean of its divisors is an integer number (2488803975).

Almost surely, 2^19433916893 is an apocalyptic number.

It is an amenable number.

19433916893 is a deficient number, since it is larger than the sum of its proper divisors (476514907).

19433916893 is an equidigital number, since it uses as much as digits as its factorization.

19433916893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59967.

The product of its digits is 3779136, while the sum is 56.

The spelling of 19433916893 in words is "nineteen billion, four hundred thirty-three million, nine hundred sixteen thousand, eight hundred ninety-three".