21300541 has 16 divisors (see below), whose sum is σ = 23514624. Its totient is φ = 19212544.

The previous prime is 21300527. The next prime is 21300551. The reversal of 21300541 is 14500312.

It is a cyclic number.

It is not a de Polignac number, because 21300541 - 2⁵ = 21300509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42096 + ... + 42598.

It is an arithmetic number, because the mean of its divisors is an integer number (1469664).

Almost surely, 2^21300541 is an apocalyptic number.

It is an amenable number.

21300541 is a deficient number, since it is larger than the sum of its proper divisors (2214083).

21300541 is a wasteful number, since it uses less digits than its factorization.

21300541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21300541 is about 4615.2509140891. The cubic root of 21300541 is about 277.2023310281.

Adding to 21300541 its reverse (14500312), we get a palindrome (35800853).

The spelling of 21300541 in words is "twenty-one million, three hundred thousand, five hundred forty-one".