19894980480 has 256 divisors, whose sum is σ = 64737066240. Its totient is φ = 5195939840.

The previous prime is 19894980463. The next prime is 19894980493. The reversal of 19894980480 is 8408949891.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20875684 + ... + 20876636.

It is an arithmetic number, because the mean of its divisors is an integer number (252879165).

Almost surely, 2^19894980480 is an apocalyptic number.

19894980480 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 19894980480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32368533120).

19894980480 is an abundant number, since it is smaller than the sum of its proper divisors (44842085760).

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

19894980480 is a wasteful number, since it uses less digits than its factorization.

19894980480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 60.

The spelling of 19894980480 in words is "nineteen billion, eight hundred ninety-four million, nine hundred eighty thousand, four hundred eighty".