19788183797 has 4 divisors (see below), whose sum is σ = 19789114656. Its totient is φ = 19787252940.

The previous prime is 19788183769. The next prime is 19788183853. The reversal of 19788183797 is 79738188791.

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 19788183797 - 2⁶ = 19788183733 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 (19788183757) 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, 432779 + ... + 476312.

It is an arithmetic number, because the mean of its divisors is an integer number (4947278664).

Almost surely, 2^19788183797 is an apocalyptic number.

It is an amenable number.

19788183797 is a deficient number, since it is larger than the sum of its proper divisors (930859).

19788183797 is an equidigital number, since it uses as much as digits as its factorization.

19788183797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930858.

The product of its digits is 42674688, while the sum is 68.

The spelling of 19788183797 in words is "nineteen billion, seven hundred eighty-eight million, one hundred eighty-three thousand, seven hundred ninety-seven".