19445893428 has 96 divisors (see below), whose sum is σ = 52213835520. Its totient is φ = 5579642880.

The previous prime is 19445893399. The next prime is 19445893451. The reversal of 19445893428 is 82439854491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255433 + ... + 322703.

It is an arithmetic number, because the mean of its divisors is an integer number (543894120).

Almost surely, 2^19445893428 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 19445893428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26106917760).

19445893428 is an abundant number, since it is smaller than the sum of its proper divisors (32767942092).

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

19445893428 is a wasteful number, since it uses less digits than its factorization.

19445893428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67417 (or 67415 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The spelling of 19445893428 in words is "nineteen billion, four hundred forty-five million, eight hundred ninety-three thousand, four hundred twenty-eight".