19427776788079 has 4 divisors (see below), whose sum is σ = 21193938314280. Its totient is φ = 17661615261880.

The previous prime is 19427776788073. The next prime is 19427776788089. The reversal of 19427776788079 is 97088767772491.

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

It is a cyclic number.

It is not a de Polignac number, because 19427776788079 - 2³⁵ = 19393417049711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19427776787993 and 19427776788011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19427776788073) 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, 883080763084 + ... + 883080763105.

It is an arithmetic number, because the mean of its divisors is an integer number (5298484578570).

Almost surely, 2^{19427776788079} is an apocalyptic number.

19427776788079 is a deficient number, since it is larger than the sum of its proper divisors (1766161526201).

19427776788079 is a wasteful number, since it uses less digits than its factorization.

19427776788079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766161526200.

The product of its (nonzero) digits is 4182119424, while the sum is 82.

The spelling of 19427776788079 in words is "nineteen trillion, four hundred twenty-seven billion, seven hundred seventy-six million, seven hundred eighty-eight thousand, seventy-nine".