19953964 has 12 divisors (see below), whose sum is σ = 35265888. Its totient is φ = 9878000.

The previous prime is 19953959. The next prime is 19953979. The reversal of 19953964 is 46935991.

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, 24292 + ... + 25099.

It is an arithmetic number, because the mean of its divisors is an integer number (2938824).

Almost surely, 2^19953964 is an apocalyptic number.

It is an amenable number.

19953964 is a deficient number, since it is larger than the sum of its proper divisors (15311924).

19953964 is a wasteful number, since it uses less digits than its factorization.

19953964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49496 (or 49494 counting only the distinct ones).

The product of its digits is 262440, while the sum is 46.

The square root of 19953964 is about 4466.9860084849. The cubic root of 19953964 is about 271.2333334419.

The spelling of 19953964 in words is "nineteen million, nine hundred fifty-three thousand, nine hundred sixty-four".