19009964 has 18 divisors (see below), whose sum is σ = 34460244. Its totient is φ = 9175600.

The previous prime is 19009957. The next prime is 19009967. The reversal of 19009964 is 46990091.

It is a super-2 number, since 2×19009964² = 722757462562592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19009967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 539 + ... + 6189.

It is an arithmetic number, because the mean of its divisors is an integer number (1914458).

Almost surely, 2^19009964 is an apocalyptic number.

It is an amenable number.

19009964 is a deficient number, since it is larger than the sum of its proper divisors (15450280).

19009964 is a wasteful number, since it uses less digits than its factorization.

19009964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713 (or 5682 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 19009964 is about 4360.0417429194. The cubic root of 19009964 is about 266.8868022540.

The spelling of 19009964 in words is "nineteen million, nine thousand, nine hundred sixty-four".