19428928845287 has 8 divisors (see below), whose sum is σ = 20990739850080. Its totient is φ = 17876728985760.

The previous prime is 19428928845283. The next prime is 19428928845419. The reversal of 19428928845287 is 78254882982491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19428928845287 - 2² = 19428928845283 is a prime.

It is a super-2 number, since 2×19428928845287² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428928845283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2402782112 + ... + 2402790197.

It is an arithmetic number, because the mean of its divisors is an integer number (2623842481260).

Almost surely, 2^{19428928845287} is an apocalyptic number.

19428928845287 is a deficient number, since it is larger than the sum of its proper divisors (1561811004793).

19428928845287 is a wasteful number, since it uses less digits than its factorization.

19428928845287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805572633.

The product of its digits is 1486356480, while the sum is 77.

The spelling of 19428928845287 in words is "nineteen trillion, four hundred twenty-eight billion, nine hundred twenty-eight million, eight hundred forty-five thousand, two hundred eighty-seven".