19803912 has 32 divisors (see below), whose sum is σ = 52423200. Its totient is φ = 6212864.

The previous prime is 19803907. The next prime is 19803919. The reversal of 19803912 is 21930891.

It is not an unprimeable number, because it can be changed into a prime (19803919) 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 7 ways as a sum of consecutive naturals, for example, 23862 + ... + 24677.

It is an arithmetic number, because the mean of its divisors is an integer number (1638225).

Almost surely, 2^19803912 is an apocalyptic number.

19803912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19803912 is an abundant number, since it is smaller than the sum of its proper divisors (32619288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19803912 is a wasteful number, since it uses less digits than its factorization.

19803912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48565 (or 48561 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 19803912 is about 4450.1586488574. The cubic root of 19803912 is about 270.5517387078.

The spelling of 19803912 in words is "nineteen million, eight hundred three thousand, nine hundred twelve".