21000341 has 4 divisors (see below), whose sum is σ = 21036000. Its totient is φ = 20964684.

The previous prime is 21000337. The next prime is 21000367. The reversal of 21000341 is 14300012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21000341 - 2² = 21000337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000391) 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, 16931 + ... + 18128.

It is an arithmetic number, because the mean of its divisors is an integer number (5259000).

Almost surely, 2^21000341 is an apocalyptic number.

It is an amenable number.

21000341 is a deficient number, since it is larger than the sum of its proper divisors (35659).

21000341 is an equidigital number, since it uses as much as digits as its factorization.

21000341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35658.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21000341 is about 4582.6129009551. The cubic root of 21000341 is about 275.8939109525.

Adding to 21000341 its reverse (14300012), we get a palindrome (35300353).

The spelling of 21000341 in words is "twenty-one million, three hundred forty-one", and thus it is an aban number.