19964764 has 12 divisors (see below), whose sum is σ = 35022064. Its totient is φ = 9958464.

The previous prime is 19964761. The next prime is 19964779. The reversal of 19964764 is 46746991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19964761) by changing a digit.

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, 4032 + ... + 7495.

Almost surely, 2^19964764 is an apocalyptic number.

It is an amenable number.

19964764 is a deficient number, since it is larger than the sum of its proper divisors (15057300).

19964764 is a wasteful number, since it uses less digits than its factorization.

19964764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11964 (or 11962 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 19964764 is about 4468.1947137519. The cubic root of 19964764 is about 271.2822592538.

The spelling of 19964764 in words is "nineteen million, nine hundred sixty-four thousand, seven hundred sixty-four".