19886244966 has 72 divisors (see below), whose sum is σ = 50186892600. Its totient is φ = 5674366656.

The previous prime is 19886244913. The next prime is 19886244991. The reversal of 19886244966 is 66944268891.

19886244966 is a `hidden beast` number, since 1 + 9 + 88 + 62 + 4 + 496 + 6 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 679810 + ... + 708458.

It is an arithmetic number, because the mean of its divisors is an integer number (697040175).

Almost surely, 2^19886244966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19886244966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25093446300).

19886244966 is an abundant number, since it is smaller than the sum of its proper divisors (30300647634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19886244966 is a wasteful number, since it uses less digits than its factorization.

19886244966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29458 (or 29448 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 63.

The spelling of 19886244966 in words is "nineteen billion, eight hundred eighty-six million, two hundred forty-four thousand, nine hundred sixty-six".