19908047880 has 384 divisors, whose sum is σ = 78545376000. Its totient is φ = 4268998656.

The previous prime is 19908047849. The next prime is 19908047947. The reversal of 19908047880 is 8874080991.

19908047880 is a `hidden beast` number, since 1 + 9 + 90 + 8 + 0 + 478 + 80 = 666.

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 95 ways as a sum of consecutive naturals, for example, 18977596 + ... + 18978644.

It is an arithmetic number, because the mean of its divisors is an integer number (204545250).

Almost surely, 2^19908047880 is an apocalyptic number.

19908047880 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 19908047880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39272688000).

19908047880 is an abundant number, since it is smaller than the sum of its proper divisors (58637328120).

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

19908047880 is a wasteful number, since it uses less digits than its factorization.

19908047880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 19908047880 in words is "nineteen billion, nine hundred eight million, forty-seven thousand, eight hundred eighty".