21335469 has 8 divisors (see below), whose sum is σ = 28493472. Its totient is φ = 14200560.

The previous prime is 21335453. The next prime is 21335477. The reversal of 21335469 is 96453312.

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

It is not a de Polignac number, because 21335469 - 2⁴ = 21335453 is a prime.

It is a super-2 number, since 2×21335469² = 910404474899922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335449) 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, 3487 + ... + 7404.

It is an arithmetic number, because the mean of its divisors is an integer number (3561684).

Almost surely, 2^21335469 is an apocalyptic number.

It is an amenable number.

21335469 is a deficient number, since it is larger than the sum of its proper divisors (7158003).

21335469 is a wasteful number, since it uses less digits than its factorization.

21335469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11547.

The product of its digits is 19440, while the sum is 33.

The square root of 21335469 is about 4619.0333404296. The cubic root of 21335469 is about 277.3537643599.

The spelling of 21335469 in words is "twenty-one million, three hundred thirty-five thousand, four hundred sixty-nine".