21482855 has 4 divisors (see below), whose sum is σ = 25779432. Its totient is φ = 17186280.

The previous prime is 21482837. The next prime is 21482869. The reversal of 21482855 is 55828412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21482855 - 2¹⁸ = 21220711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2148281 + ... + 2148290.

It is an arithmetic number, because the mean of its divisors is an integer number (6444858).

Almost surely, 2^21482855 is an apocalyptic number.

21482855 is a deficient number, since it is larger than the sum of its proper divisors (4296577).

21482855 is an equidigital number, since it uses as much as digits as its factorization.

21482855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296576.

The product of its digits is 25600, while the sum is 35.

The square root of 21482855 is about 4634.9600861280. The cubic root of 21482855 is about 277.9909551428.

The spelling of 21482855 in words is "twenty-one million, four hundred eighty-two thousand, eight hundred fifty-five".