19788257041 has 4 divisors (see below), whose sum is σ = 22615150912. Its totient is φ = 16961363172.

The previous prime is 19788257011. The next prime is 19788257051. The reversal of 19788257041 is 14075288791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19788257041 - 2¹³ = 19788248849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19788257041.

It is not an unprimeable number, because it can be changed into a prime (19788257011) 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, 1413446925 + ... + 1413446938.

It is an arithmetic number, because the mean of its divisors is an integer number (5653787728).

Almost surely, 2^19788257041 is an apocalyptic number.

It is an amenable number.

19788257041 is a deficient number, since it is larger than the sum of its proper divisors (2826893871).

19788257041 is an equidigital number, since it uses as much as digits as its factorization.

19788257041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826893870.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 19788257041 in words is "nineteen billion, seven hundred eighty-eight million, two hundred fifty-seven thousand, forty-one".