19910968 has 32 divisors (see below), whose sum is σ = 46546560. Its totient is φ = 7757280.

The previous prime is 19910963. The next prime is 19910977. The reversal of 19910968 is 86901991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19910963) 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 7 ways as a sum of consecutive naturals, for example, 15546 + ... + 16777.

It is an arithmetic number, because the mean of its divisors is an integer number (1454580).

Almost surely, 2^19910968 is an apocalyptic number.

It is an amenable number.

19910968 is an abundant number, since it is smaller than the sum of its proper divisors (26635592).

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

19910968 is a wasteful number, since it uses less digits than its factorization.

19910968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32347 (or 32343 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 19910968 is about 4462.1707721691. The cubic root of 19910968 is about 271.0383791181.

The spelling of 19910968 in words is "nineteen million, nine hundred ten thousand, nine hundred sixty-eight".