19885512255 has 128 divisors (see below), whose sum is σ = 39481344000. Its totient is φ = 8340793344.

The previous prime is 19885512223. The next prime is 19885512277. The reversal of 19885512255 is 55221558891.

It is a happy number.

It is a Cunningham number, because it is equal to 141016²-1.

It is not a de Polignac number, because 19885512255 - 2⁵ = 19885512223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 19885512198 and 19885512207.

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 11703396 + ... + 11705094.

It is an arithmetic number, because the mean of its divisors is an integer number (308448000).

Almost surely, 2^19885512255 is an apocalyptic number.

19885512255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19885512255 is a deficient number, since it is larger than the sum of its proper divisors (19595831745).

19885512255 is a wasteful number, since it uses less digits than its factorization.

19885512255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893.

The product of its digits is 1440000, while the sum is 51.

The spelling of 19885512255 in words is "nineteen billion, eight hundred eighty-five million, five hundred twelve thousand, two hundred fifty-five".