19848491520 has 960 divisors, whose sum is σ = 78996943872. Its totient is φ = 4217241600.

The previous prime is 19848491497. The next prime is 19848491521. The reversal of 19848491520 is 2519484891.

It is a tau number, because it is divible by the number of its divisors (960).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19848491521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 374499814 + ... + 374499866.

Almost surely, 2^19848491520 is an apocalyptic number.

19848491520 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 19848491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39498471936).

19848491520 is an abundant number, since it is smaller than the sum of its proper divisors (59148452352).

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

19848491520 is a wasteful number, since it uses less digits than its factorization.

19848491520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 19848491520 in words is "nineteen billion, eight hundred forty-eight million, four hundred ninety-one thousand, five hundred twenty".