19963814 has 48 divisors (see below), whose sum is σ = 36033984. Its totient is φ = 8213760.

The previous prime is 19963807. The next prime is 19963817. The reversal of 19963814 is 41836991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19963817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 424739 + ... + 424785.

It is an arithmetic number, because the mean of its divisors is an integer number (750708).

Almost surely, 2^19963814 is an apocalyptic number.

19963814 is a deficient number, since it is larger than the sum of its proper divisors (16070170).

19963814 is a wasteful number, since it uses less digits than its factorization.

19963814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 110 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 19963814 is about 4468.0884055712. The cubic root of 19963814 is about 271.2779563023.

The spelling of 19963814 in words is "nineteen million, nine hundred sixty-three thousand, eight hundred fourteen".