21141066 has 16 divisors (see below), whose sum is σ = 42588000. Its totient is φ = 6996048.

The previous prime is 21141061. The next prime is 21141067. The reversal of 21141066 is 66014112.

It is not an unprimeable number, because it can be changed into a prime (21141061) 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, 11841 + ... + 13508.

It is an arithmetic number, because the mean of its divisors is an integer number (2661750).

Almost surely, 2^21141066 is an apocalyptic number.

21141066 is an abundant number, since it is smaller than the sum of its proper divisors (21446934).

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

21141066 is a wasteful number, since it uses less digits than its factorization.

21141066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25493.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21141066 is about 4597.9414959305. The cubic root of 21141066 is about 276.5088020550.

Adding to 21141066 its reverse (66014112), we get a palindrome (87155178).

It can be divided in two parts, 2114106 and 6, that added together give a palindrome (2114112).

The spelling of 21141066 in words is "twenty-one million, one hundred forty-one thousand, sixty-six".