19898194680 has 384 divisors, whose sum is σ = 84277065600. Its totient is φ = 3951230976.

The previous prime is 19898194627. The next prime is 19898194681. The reversal of 19898194680 is 8649189891.

19898194680 is a `hidden beast` number, since 1 + 98 + 9 + 81 + 9 + 468 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19898194681) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 539056 + ... + 574784.

It is an arithmetic number, because the mean of its divisors is an integer number (219471525).

Almost surely, 2^19898194680 is an apocalyptic number.

19898194680 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 19898194680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42138532800).

19898194680 is an abundant number, since it is smaller than the sum of its proper divisors (64378870920).

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

19898194680 is a wasteful number, since it uses less digits than its factorization.

19898194680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35783 (or 35776 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 19898194680 in words is "nineteen billion, eight hundred ninety-eight million, one hundred ninety-four thousand, six hundred eighty".