19676851440 has 320 divisors, whose sum is σ = 67469967360. Its totient is φ = 4721587200.

The previous prime is 19676851343. The next prime is 19676851499. The reversal of 19676851440 is 4415867691.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 17094865 + ... + 17096015.

It is an arithmetic number, because the mean of its divisors is an integer number (210843648).

Almost surely, 2^19676851440 is an apocalyptic number.

19676851440 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 19676851440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33734983680).

19676851440 is an abundant number, since it is smaller than the sum of its proper divisors (47793115920).

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

19676851440 is a wasteful number, since it uses less digits than its factorization.

19676851440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 19676851440 in words is "nineteen billion, six hundred seventy-six million, eight hundred fifty-one thousand, four hundred forty".