19145703424 has 135 divisors (see below), whose sum is σ = 40897180807. Its totient is φ = 8961818624.

The previous prime is 19145703397. The next prime is 19145703439. The reversal of 19145703424 is 42430754191.

The square root of 19145703424 is 138368.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 407355369 + ... + 407355415.

Almost surely, 2^19145703424 is an apocalyptic number.

19145703424 is the 138368-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19145703424

19145703424 is an abundant number, since it is smaller than the sum of its proper divisors (21751477383).

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

19145703424 is an frugal number, since it uses more digits than its factorization.

19145703424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 19145703424 in words is "nineteen billion, one hundred forty-five million, seven hundred three thousand, four hundred twenty-four".