19944946328 has 8 divisors (see below), whose sum is σ = 37396774380. Its totient is φ = 9972473160.

The previous prime is 19944946321. The next prime is 19944946423. The reversal of 19944946328 is 82364944991.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19944946321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1246559138 + ... + 1246559153.

Almost surely, 2^19944946328 is an apocalyptic number.

It is an amenable number.

19944946328 is a deficient number, since it is larger than the sum of its proper divisors (17451828052).

19944946328 is a wasteful number, since it uses less digits than its factorization.

19944946328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493118297 (or 2493118293 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 59.

The spelling of 19944946328 in words is "nineteen billion, nine hundred forty-four million, nine hundred forty-six thousand, three hundred twenty-eight".