21335341 has 4 divisors (see below), whose sum is σ = 21546684. Its totient is φ = 21124000.

The previous prime is 21335339. The next prime is 21335351. The reversal of 21335341 is 14353312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12460900 + 8874441 = 3530^2 + 2979^2 .

It is a cyclic number.

It is not a de Polignac number, because 21335341 - 2¹ = 21335339 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 (21335311) 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, 105520 + ... + 105721.

It is an arithmetic number, because the mean of its divisors is an integer number (5386671).

Almost surely, 2^21335341 is an apocalyptic number.

It is an amenable number.

21335341 is a deficient number, since it is larger than the sum of its proper divisors (211343).

21335341 is a wasteful number, since it uses less digits than its factorization.

21335341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211342.

The product of its digits is 1080, while the sum is 22.

The square root of 21335341 is about 4619.0194846959. The cubic root of 21335341 is about 277.3532097068.

Adding to 21335341 its reverse (14353312), we get a palindrome (35688653).

The spelling of 21335341 in words is "twenty-one million, three hundred thirty-five thousand, three hundred forty-one".