19445278612 has 24 divisors (see below), whose sum is σ = 35135089920. Its totient is φ = 9406826880.

The previous prime is 19445278603. The next prime is 19445278667. The reversal of 19445278612 is 21687254491.

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, 605463 + ... + 636769.

It is an arithmetic number, because the mean of its divisors is an integer number (1463962080).

Almost surely, 2^19445278612 is an apocalyptic number.

It is an amenable number.

19445278612 is a deficient number, since it is larger than the sum of its proper divisors (15689811308).

19445278612 is a wasteful number, since it uses less digits than its factorization.

19445278612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36351 (or 36349 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The spelling of 19445278612 in words is "nineteen billion, four hundred forty-five million, two hundred seventy-eight thousand, six hundred twelve".