19806368127 has 64 divisors (see below), whose sum is σ = 33330769920. Its totient is φ = 10183739904.

The previous prime is 19806368111. The next prime is 19806368129. The reversal of 19806368127 is 72186360891.

It is not a de Polignac number, because 19806368127 - 2⁴ = 19806368111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19806368127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19806368129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2267274 + ... + 2275992.

It is an arithmetic number, because the mean of its divisors is an integer number (520793280).

Almost surely, 2^19806368127 is an apocalyptic number.

19806368127 is a deficient number, since it is larger than the sum of its proper divisors (13524401793).

19806368127 is a wasteful number, since it uses less digits than its factorization.

19806368127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8952.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 19806368127 in words is "nineteen billion, eight hundred six million, three hundred sixty-eight thousand, one hundred twenty-seven".