21334541 has 8 divisors (see below), whose sum is σ = 23318784. Its totient is φ = 19431360.

The previous prime is 21334499. The next prime is 21334559. The reversal of 21334541 is 14543312.

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 21334541 - 2²² = 17140237 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 (21334561) 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, 19715 + ... + 20768.

It is an arithmetic number, because the mean of its divisors is an integer number (2914848).

Almost surely, 2^21334541 is an apocalyptic number.

It is an amenable number.

21334541 is a deficient number, since it is larger than the sum of its proper divisors (1984243).

21334541 is a wasteful number, since it uses less digits than its factorization.

21334541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40531.

The product of its digits is 1440, while the sum is 23.

The square root of 21334541 is about 4618.9328854184. The cubic root of 21334541 is about 277.3497430746.

Adding to 21334541 its reverse (14543312), we get a palindrome (35877853).

The spelling of 21334541 in words is "twenty-one million, three hundred thirty-four thousand, five hundred forty-one".