21469355 has 8 divisors (see below), whose sum is σ = 25899264. Its totient is φ = 17084800.

The previous prime is 21469339. The next prime is 21469379. The reversal of 21469355 is 55396412.

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

It is not a de Polignac number, because 21469355 - 2⁴ = 21469339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 10286 + ... + 12195.

It is an arithmetic number, because the mean of its divisors is an integer number (3237408).

Almost surely, 2^21469355 is an apocalyptic number.

21469355 is a deficient number, since it is larger than the sum of its proper divisors (4429909).

21469355 is a wasteful number, since it uses less digits than its factorization.

21469355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22677.

The product of its digits is 32400, while the sum is 35.

The square root of 21469355 is about 4633.5035340442. The cubic root of 21469355 is about 277.9327123521.

The spelling of 21469355 in words is "twenty-one million, four hundred sixty-nine thousand, three hundred fifty-five".