19899357480 has 192 divisors, whose sum is σ = 71013983040. Its totient is φ = 4994307072.

The previous prime is 19899357473. The next prime is 19899357481. The reversal of 19899357480 is 8475399891.

19899357480 is a `hidden beast` number, since 19 + 8 + 9 + 93 + 57 + 480 = 666.

It is not an unprimeable number, because it can be changed into a prime (19899357481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105027 + ... + 225453.

It is an arithmetic number, because the mean of its divisors is an integer number (369864495).

Almost surely, 2^19899357480 is an apocalyptic number.

19899357480 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 19899357480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35506991520).

19899357480 is an abundant number, since it is smaller than the sum of its proper divisors (51114625560).

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

19899357480 is a wasteful number, since it uses less digits than its factorization.

19899357480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120470 (or 120454 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 19899357480 in words is "nineteen billion, eight hundred ninety-nine million, three hundred fifty-seven thousand, four hundred eighty".