19628928425 has 24 divisors (see below), whose sum is σ = 24870432000. Its totient is φ = 15361188480.

The previous prime is 19628928421. The next prime is 19628928457. The reversal of 19628928425 is 52482982691.

It is not a de Polignac number, because 19628928425 - 2² = 19628928421 is a prime.

It is a super-2 number, since 2×19628928425² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19628928421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3579836 + ... + 3585314.

It is an arithmetic number, because the mean of its divisors is an integer number (1036268000).

Almost surely, 2^19628928425 is an apocalyptic number.

It is an amenable number.

19628928425 is a deficient number, since it is larger than the sum of its proper divisors (5241503575).

19628928425 is a wasteful number, since it uses less digits than its factorization.

19628928425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8585 (or 8580 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 56.

The spelling of 19628928425 in words is "nineteen billion, six hundred twenty-eight million, nine hundred twenty-eight thousand, four hundred twenty-five".