19486309968 has 160 divisors (see below), whose sum is σ = 57000181120. Its totient is φ = 6452244864.

The previous prime is 19486309961. The next prime is 19486309979. The reversal of 19486309968 is 86990368491.

It is a happy number.

19486309968 is a `hidden beast` number, since 1 + 9 + 486 + 3 + 0 + 99 + 68 = 666.

It is a super-2 number, since 2×19486309968² (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 (19486309961) 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 31 ways as a sum of consecutive naturals, for example, 5491971 + ... + 5495517.

It is an arithmetic number, because the mean of its divisors is an integer number (356251132).

Almost surely, 2^19486309968 is an apocalyptic number.

19486309968 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 19486309968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28500090560).

19486309968 is an abundant number, since it is smaller than the sum of its proper divisors (37513871152).

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

19486309968 is an equidigital number, since it uses as much as digits as its factorization.

19486309968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733 (or 3709 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 19486309968 in words is "nineteen billion, four hundred eighty-six million, three hundred nine thousand, nine hundred sixty-eight".