21832074 has 48 divisors (see below), whose sum is σ = 52363584. Its totient is φ = 6518400.

The previous prime is 21832051. The next prime is 21832079. The reversal of 21832074 is 47023812.

It is not an unprimeable number, because it can be changed into a prime (21832079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13282 + ... + 14834.

It is an arithmetic number, because the mean of its divisors is an integer number (1090908).

Almost surely, 2^21832074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21832074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26181792).

21832074 is an abundant number, since it is smaller than the sum of its proper divisors (30531510).

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

21832074 is a wasteful number, since it uses less digits than its factorization.

21832074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 21832074 is about 4672.4804975516. The cubic root of 21832074 is about 279.4891791899.

Adding to 21832074 its reverse (47023812), we get a palindrome (68855886).

The spelling of 21832074 in words is "twenty-one million, eight hundred thirty-two thousand, seventy-four".