21334413 has 8 divisors (see below), whose sum is σ = 28594048. Its totient is φ = 14148864.

The previous prime is 21334387. The next prime is 21334427. The reversal of 21334413 is 31443312.

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

It is not a de Polignac number, because 21334413 - 2⁹ = 21333901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21334413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334433) 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 7 ways as a sum of consecutive naturals, for example, 17845 + ... + 19002.

It is an arithmetic number, because the mean of its divisors is an integer number (3574256).

Almost surely, 2^21334413 is an apocalyptic number.

It is an amenable number.

21334413 is a deficient number, since it is larger than the sum of its proper divisors (7259635).

21334413 is a wasteful number, since it uses less digits than its factorization.

21334413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37043.

The product of its digits is 864, while the sum is 21.

The square root of 21334413 is about 4618.9190293834. The cubic root of 21334413 is about 277.3491884054.

Adding to 21334413 its reverse (31443312), we get a palindrome (52777725).

The spelling of 21334413 in words is "twenty-one million, three hundred thirty-four thousand, four hundred thirteen".