19964218992 has 80 divisors (see below), whose sum is σ = 54314856960. Its totient is φ = 6301449216.

The previous prime is 19964218949. The next prime is 19964219071. The reversal of 19964218992 is 29981246991.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2579833 + ... + 2587559.

It is an arithmetic number, because the mean of its divisors is an integer number (678935712).

Almost surely, 2^19964218992 is an apocalyptic number.

19964218992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19964218992 is an abundant number, since it is smaller than the sum of its proper divisors (34350637968).

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

19964218992 is a wasteful number, since it uses less digits than its factorization.

19964218992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10590 (or 10584 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 60.

The spelling of 19964218992 in words is "nineteen billion, nine hundred sixty-four million, two hundred eighteen thousand, nine hundred ninety-two".