19894446 has 96 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 5428800.

The previous prime is 19894421. The next prime is 19894447. The reversal of 19894446 is 64449891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894447) 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, 151801 + ... + 151931.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^19894446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19894446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25945920).

19894446 is an abundant number, since it is smaller than the sum of its proper divisors (31997394).

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

19894446 is a wasteful number, since it uses less digits than its factorization.

19894446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 219 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 19894446 is about 4460.3190468844. The cubic root of 19894446 is about 270.9633897068.

The spelling of 19894446 in words is "nineteen million, eight hundred ninety-four thousand, four hundred forty-six".