21041446 has 8 divisors (see below), whose sum is σ = 32332104. Its totient is φ = 10264080.

The previous prime is 21041441. The next prime is 21041453. The reversal of 21041446 is 64414012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128220 + ... + 128383.

It is an arithmetic number, because the mean of its divisors is an integer number (4041513).

Almost surely, 2^21041446 is an apocalyptic number.

21041446 is a deficient number, since it is larger than the sum of its proper divisors (11290658).

21041446 is a wasteful number, since it uses less digits than its factorization.

21041446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256646.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 21041446 is about 4587.0955952541. The cubic root of 21041446 is about 276.0738005403.

Adding to 21041446 its reverse (64414012), we get a palindrome (85455458).

The spelling of 21041446 in words is "twenty-one million, forty-one thousand, four hundred forty-six".