19641232 has 40 divisors (see below), whose sum is σ = 41481720. Its totient is φ = 8954880.

The previous prime is 19641221. The next prime is 19641233. The reversal of 19641232 is 23214691.

It can be written as a sum of positive squares in 4 ways, for example, as 246016 + 19395216 = 496^2 + 4404^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19641232.

It is not an unprimeable number, because it can be changed into a prime (19641233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17982 + ... + 19042.

It is an arithmetic number, because the mean of its divisors is an integer number (1037043).

Almost surely, 2^19641232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19641232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20740860).

19641232 is an abundant number, since it is smaller than the sum of its proper divisors (21840488).

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

19641232 is a wasteful number, since it uses less digits than its factorization.

19641232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1165 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 19641232 is about 4431.8429575065. The cubic root of 19641232 is about 269.8088816678.

The spelling of 19641232 in words is "nineteen million, six hundred forty-one thousand, two hundred thirty-two".