19345421312 has 88 divisors (see below), whose sum is σ = 44319351360. Its totient is φ = 8267857920.

The previous prime is 19345421281. The next prime is 19345421339. The reversal of 19345421312 is 21312454391.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2713112 + ... + 2720232.

Almost surely, 2^19345421312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19345421312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22159675680).

19345421312 is an abundant number, since it is smaller than the sum of its proper divisors (24973930048).

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

19345421312 is an equidigital number, since it uses as much as digits as its factorization.

19345421312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7527 (or 7509 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The spelling of 19345421312 in words is "nineteen billion, three hundred forty-five million, four hundred twenty-one thousand, three hundred twelve".