21334479 has 8 divisors (see below), whose sum is σ = 29363712. Its totient is φ = 13764120.

The previous prime is 21334463. The next prime is 21334487. The reversal of 21334479 is 97443312.

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

It is not a de Polignac number, because 21334479 - 2⁴ = 21334463 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114609 + ... + 114794.

It is an arithmetic number, because the mean of its divisors is an integer number (3670464).

Almost surely, 2^21334479 is an apocalyptic number.

21334479 is a deficient number, since it is larger than the sum of its proper divisors (8029233).

21334479 is a wasteful number, since it uses less digits than its factorization.

21334479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229437.

The product of its digits is 18144, while the sum is 33.

The square root of 21334479 is about 4618.9261739067. The cubic root of 21334479 is about 277.3494744070.

The spelling of 21334479 in words is "twenty-one million, three hundred thirty-four thousand, four hundred seventy-nine".