19493237380 has 48 divisors (see below), whose sum is σ = 42796897920. Its totient is φ = 7458189024.

The previous prime is 19493237363. The next prime is 19493237381. The reversal of 19493237380 is 8373239491.

It is not an unprimeable number, because it can be changed into a prime (19493237381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203287 + ... + 283393.

It is an arithmetic number, because the mean of its divisors is an integer number (891602040).

Almost surely, 2^19493237380 is an apocalyptic number.

19493237380 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 19493237380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21398448960).

19493237380 is an abundant number, since it is smaller than the sum of its proper divisors (23303660540).

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

19493237380 is an equidigital number, since it uses as much as digits as its factorization.

19493237380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80185 (or 80137 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 19493237380 in words is "nineteen billion, four hundred ninety-three million, two hundred thirty-seven thousand, three hundred eighty".