19308113440 has 384 divisors, whose sum is σ = 58629795840. Its totient is φ = 5835264000.

The previous prime is 19308113437. The next prime is 19308113441. The reversal of 19308113440 is 4431180391.

It is a super-2 number, since 2×19308113440² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19308113396 and 19308113405.

It is not an unprimeable number, because it can be changed into a prime (19308113441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73414749 + ... + 73415011.

It is an arithmetic number, because the mean of its divisors is an integer number (152681760).

Almost surely, 2^19308113440 is an apocalyptic number.

19308113440 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 19308113440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29314897920).

19308113440 is an abundant number, since it is smaller than the sum of its proper divisors (39321682400).

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

19308113440 is a wasteful number, since it uses less digits than its factorization.

19308113440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 19308113440 in words is "nineteen billion, three hundred eight million, one hundred thirteen thousand, four hundred forty".