19632987125 has 16 divisors (see below), whose sum is σ = 24505955760. Its totient is φ = 15703833600.

The previous prime is 19632987103. The next prime is 19632987193. The reversal of 19632987125 is 52178923691.

It can be written as a sum of positive squares in 8 ways, for example, as 7922068036 + 11710919089 = 89006^2 + 108217^2 .

It is not a de Polignac number, because 19632987125 - 2²⁰ = 19631938549 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1276481 + ... + 1291769.

It is an arithmetic number, because the mean of its divisors is an integer number (1531622235).

Almost surely, 2^19632987125 is an apocalyptic number.

It is an amenable number.

19632987125 is a deficient number, since it is larger than the sum of its proper divisors (4872968635).

19632987125 is a wasteful number, since it uses less digits than its factorization.

19632987125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25577 (or 25567 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The spelling of 19632987125 in words is "nineteen billion, six hundred thirty-two million, nine hundred eighty-seven thousand, one hundred twenty-five".