19768266 has 96 divisors (see below), whose sum is σ = 52968960. Its totient is φ = 5443200.

The previous prime is 19768253. The next prime is 19768267. The reversal of 19768266 is 66286791.

It is not an unprimeable number, because it can be changed into a prime (19768267) 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 47 ways as a sum of consecutive naturals, for example, 81906 + ... + 82146.

It is an arithmetic number, because the mean of its divisors is an integer number (551760).

Almost surely, 2^19768266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19768266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26484480).

19768266 is an abundant number, since it is smaller than the sum of its proper divisors (33200694).

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

19768266 is a wasteful number, since it uses less digits than its factorization.

19768266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 284 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 19768266 is about 4446.1518192702. The cubic root of 19768266 is about 270.3893149175.

The spelling of 19768266 in words is "nineteen million, seven hundred sixty-eight thousand, two hundred sixty-six".