19964396 has 12 divisors (see below), whose sum is σ = 34971552. Its totient is φ = 9972528.

The previous prime is 19964389. The next prime is 19964429. The reversal of 19964396 is 69346991.

It is a self number, because there is not a number n which added to its sum of digits gives 19964396.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4301 + ... + 7643.

It is an arithmetic number, because the mean of its divisors is an integer number (2914296).

Almost surely, 2^19964396 is an apocalyptic number.

It is an amenable number.

19964396 is a deficient number, since it is larger than the sum of its proper divisors (15007156).

19964396 is a wasteful number, since it uses less digits than its factorization.

19964396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840 (or 4838 counting only the distinct ones).

The product of its digits is 314928, while the sum is 47.

The square root of 19964396 is about 4468.1535336199. The cubic root of 19964396 is about 271.2805924424.

The spelling of 19964396 in words is "nineteen million, nine hundred sixty-four thousand, three hundred ninety-six".