19284985980 has 384 divisors, whose sum is σ = 69727392000. Its totient is φ = 4382097408.

The previous prime is 19284985961. The next prime is 19284985987. The reversal of 19284985980 is 8958948291.

19284985980 is a `hidden beast` number, since 1 + 92 + 8 + 498 + 59 + 8 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19284985987) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 6323496 + ... + 6326544.

It is an arithmetic number, because the mean of its divisors is an integer number (181581750).

Almost surely, 2^19284985980 is an apocalyptic number.

19284985980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19284985980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34863696000).

19284985980 is an abundant number, since it is smaller than the sum of its proper divisors (50442406020).

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

19284985980 is a wasteful number, since it uses less digits than its factorization.

19284985980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150 (or 3142 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 63.

The spelling of 19284985980 in words is "nineteen billion, two hundred eighty-four million, nine hundred eighty-five thousand, nine hundred eighty".