19995125697 has 24 divisors (see below), whose sum is σ = 30679128480. Its totient is φ = 12870411120.

The previous prime is 19995125687. The next prime is 19995125753. The reversal of 19995125697 is 79652159991.

19995125697 is a `hidden beast` number, since 19 + 9 + 9 + 51 + 2 + 569 + 7 = 666.

It is not a de Polignac number, because 19995125697 - 2⁸ = 19995125441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19995125687) 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, 417579 + ... + 462992.

It is an arithmetic number, because the mean of its divisors is an integer number (1278297020).

Almost surely, 2^19995125697 is an apocalyptic number.

It is an amenable number.

19995125697 is a deficient number, since it is larger than the sum of its proper divisors (10684002783).

19995125697 is an equidigital number, since it uses as much as digits as its factorization.

19995125697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880638 (or 880603 counting only the distinct ones).

The product of its digits is 13778100, while the sum is 63.

The spelling of 19995125697 in words is "nineteen billion, nine hundred ninety-five million, one hundred twenty-five thousand, six hundred ninety-seven".