19698536448 has 234 divisors, whose sum is σ = 59166001154. Its totient is φ = 6557220864.

The previous prime is 19698536437. The next prime is 19698536483. The reversal of 19698536448 is 84463589691.

19698536448 is a `hidden beast` number, since 1 + 9 + 6 + 98 + 536 + 4 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19591041024 + 107495424 = 139968^2 + 10368^2 .

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 17 ways as a sum of consecutive naturals, for example, 26873490 + ... + 26874222.

Almost surely, 2^19698536448 is an apocalyptic number.

19698536448 is a gapful number since it is divisible by the number (18) 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 19698536448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29583000577).

19698536448 is an abundant number, since it is smaller than the sum of its proper divisors (39467464706).

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

19698536448 is an frugal number, since it uses more digits than its factorization.

19698536448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 738 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 19698536448 in words is "nineteen billion, six hundred ninety-eight million, five hundred thirty-six thousand, four hundred forty-eight".