19749633325 has 12 divisors (see below), whose sum is σ = 24493475968. Its totient is φ = 15797170800.

The previous prime is 19749633289. The next prime is 19749633367. The reversal of 19749633325 is 52333694791.

It is a happy number.

It is not a de Polignac number, because 19749633325 - 2¹⁵ = 19749600557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 104164 + ... + 224386.

Almost surely, 2^19749633325 is an apocalyptic number.

It is an amenable number.

19749633325 is a deficient number, since it is larger than the sum of its proper divisors (4743842643).

19749633325 is a wasteful number, since it uses less digits than its factorization.

19749633325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126804 (or 126799 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 52.

The spelling of 19749633325 in words is "nineteen billion, seven hundred forty-nine million, six hundred thirty-three thousand, three hundred twenty-five".