19640944952 has 16 divisors (see below), whose sum is σ = 36828322440. Its totient is φ = 9820058976.

The previous prime is 19640944907. The next prime is 19640944957. The reversal of 19640944952 is 25944904691.

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 junction number, because it is equal to n+sod(n) for n = 19640944894 and 19640944903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19640944957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262583 + ... + 328985.

Almost surely, 2^19640944952 is an apocalyptic number.

It is an amenable number.

19640944952 is a deficient number, since it is larger than the sum of its proper divisors (17187377488).

19640944952 is a wasteful number, since it uses less digits than its factorization.

19640944952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103382 (or 103378 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 19640944952 in words is "nineteen billion, six hundred forty million, nine hundred forty-four thousand, nine hundred fifty-two".