19677847680 has 384 divisors, whose sum is σ = 70628912640. Its totient is φ = 5042995200.

The previous prime is 19677847663. The next prime is 19677847681. The reversal of 19677847680 is 8674877691.

19677847680 is a `hidden beast` number, since 1 + 96 + 7 + 78 + 476 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (19677847681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34461795 + ... + 34462365.

It is an arithmetic number, because the mean of its divisors is an integer number (183929460).

Almost surely, 2^19677847680 is an apocalyptic number.

19677847680 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 19677847680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35314456320).

19677847680 is an abundant number, since it is smaller than the sum of its proper divisors (50951064960).

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

19677847680 is a wasteful number, since it uses less digits than its factorization.

19677847680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The spelling of 19677847680 in words is "nineteen billion, six hundred seventy-seven million, eight hundred forty-seven thousand, six hundred eighty".