19984368660 has 48 divisors (see below), whose sum is σ = 56451439296. Its totient is φ = 5282002432.

The previous prime is 19984368659. The next prime is 19984368697. The reversal of 19984368660 is 6686348991.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 19984368594 and 19984368603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1466994 + ... + 1480553.

It is an arithmetic number, because the mean of its divisors is an integer number (1176071652).

Almost surely, 2^19984368660 is an apocalyptic number.

19984368660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19984368660 is an abundant number, since it is smaller than the sum of its proper divisors (36467070636).

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

19984368660 is a wasteful number, since it uses less digits than its factorization.

19984368660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947672 (or 2947670 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 19984368660 in words is "nineteen billion, nine hundred eighty-four million, three hundred sixty-eight thousand, six hundred sixty".