20441264 has 30 divisors (see below), whose sum is σ = 41810940. Its totient is φ = 9679968.

The previous prime is 20441261. The next prime is 20441269. The reversal of 20441264 is 46214402.

It is not an unprimeable number, because it can be changed into a prime (20441261) 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 5 ways as a sum of consecutive naturals, for example, 4007 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (1393698).

Almost surely, 2^20441264 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 20441264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20905470).

20441264 is an abundant number, since it is smaller than the sum of its proper divisors (21369676).

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

20441264 is a wasteful number, since it uses less digits than its factorization.

20441264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585 (or 3560 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 20441264 is about 4521.2016101917. The cubic root of 20441264 is about 273.4235487783.

Adding to 20441264 its reverse (46214402), we get a palindrome (66655666).

The spelling of 20441264 in words is "twenty million, four hundred forty-one thousand, two hundred sixty-four".