19805882551 has 16 divisors (see below), whose sum is σ = 25035298624. Its totient is φ = 15247056384.

The previous prime is 19805882531. The next prime is 19805882597. The reversal of 19805882551 is 15528850891.

It is not a de Polignac number, because 19805882551 - 2⁵ = 19805882519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19805882501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2937810 + ... + 2944543.

It is an arithmetic number, because the mean of its divisors is an integer number (1564706164).

Almost surely, 2^19805882551 is an apocalyptic number.

19805882551 is a deficient number, since it is larger than the sum of its proper divisors (5229416073).

19805882551 is a wasteful number, since it uses less digits than its factorization.

19805882551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882410.

The product of its (nonzero) digits is 1152000, while the sum is 52.

The spelling of 19805882551 in words is "nineteen billion, eight hundred five million, eight hundred eighty-two thousand, five hundred fifty-one".