21200441 has 8 divisors (see below), whose sum is σ = 21756000. Its totient is φ = 20652192.

The previous prime is 21200401. The next prime is 21200461. The reversal of 21200441 is 14400212.

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

It is a cyclic number.

It is not a de Polignac number, because 21200441 - 2¹⁸ = 20938297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200401) 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, 4310 + ... + 7808.

It is an arithmetic number, because the mean of its divisors is an integer number (2719500).

Almost surely, 2^21200441 is an apocalyptic number.

It is an amenable number.

21200441 is a deficient number, since it is larger than the sum of its proper divisors (555559).

21200441 is an equidigital number, since it uses as much as digits as its factorization.

21200441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 21200441 is about 4604.3936625793. The cubic root of 21200441 is about 276.7674197971.

Adding to 21200441 its reverse (14400212), we get a palindrome (35600653).

The spelling of 21200441 in words is "twenty-one million, two hundred thousand, four hundred forty-one".