19309468240 has 160 divisors (see below), whose sum is σ = 47705946624. Its totient is φ = 7258337280.

The previous prime is 19309468229. The next prime is 19309468249. The reversal of 19309468240 is 4286490391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19309468249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12984777 + ... + 12986263.

Almost surely, 2^19309468240 is an apocalyptic number.

19309468240 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 19309468240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23852973312).

19309468240 is an abundant number, since it is smaller than the sum of its proper divisors (28396478384).

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

19309468240 is a wasteful number, since it uses less digits than its factorization.

19309468240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 19309468240 in words is "nineteen billion, three hundred nine million, four hundred sixty-eight thousand, two hundred forty".