19959619225 has 96 divisors (see below), whose sum is σ = 32171552000. Its totient is φ = 11929006080.

The previous prime is 19959619219. The next prime is 19959619241. The reversal of 19959619225 is 52291695991.

It is not a de Polignac number, because 19959619225 - 2¹¹ = 19959617177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19959619225.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17678461 + ... + 17679589.

Almost surely, 2^19959619225 is an apocalyptic number.

It is an amenable number.

19959619225 is a deficient number, since it is larger than the sum of its proper divisors (12211932775).

19959619225 is a wasteful number, since it uses less digits than its factorization.

19959619225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1582 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 58.

The spelling of 19959619225 in words is "nineteen billion, nine hundred fifty-nine million, six hundred nineteen thousand, two hundred twenty-five".