19984396698 has 144 divisors (see below), whose sum is σ = 51518683008. Its totient is φ = 5484024000.

The previous prime is 19984396693. The next prime is 19984396703. The reversal of 19984396698 is 89669348991.

19984396698 is a `hidden beast` number, since 19 + 98 + 439 + 6 + 6 + 98 = 666.

It is an interprime number because it is at equal distance from previous prime (19984396693) and next prime (19984396703).

It is a super-2 number, since 2×19984396698² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19984396693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 18283440 + ... + 18284532.

It is an arithmetic number, because the mean of its divisors is an integer number (357768632).

Almost surely, 2^19984396698 is an apocalyptic number.

19984396698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19984396698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25759341504).

19984396698 is an abundant number, since it is smaller than the sum of its proper divisors (31534286310).

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

19984396698 is a wasteful number, since it uses less digits than its factorization.

19984396698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321 (or 1287 counting only the distinct ones).

The product of its digits is 181398528, while the sum is 72.

The spelling of 19984396698 in words is "nineteen billion, nine hundred eighty-four million, three hundred ninety-six thousand, six hundred ninety-eight".