21884482 has 8 divisors (see below), whose sum is σ = 33365052. Its totient is φ = 10762800.

The previous prime is 21884459. The next prime is 21884483. The reversal of 21884482 is 28448812.

It can be written as a sum of positive squares in 2 ways, for example, as 21242881 + 641601 = 4609^2 + 801^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21884483) 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 3 ways as a sum of consecutive naturals, for example, 89569 + ... + 89812.

Almost surely, 2^21884482 is an apocalyptic number.

21884482 is a deficient number, since it is larger than the sum of its proper divisors (11480570).

21884482 is a wasteful number, since it uses less digits than its factorization.

21884482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179444.

The product of its digits is 32768, while the sum is 37.

The square root of 21884482 is about 4678.0852920826. The cubic root of 21884482 is about 279.7126388586.

It can be divided in two parts, 21884 and 482, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 21884482 in words is "twenty-one million, eight hundred eighty-four thousand, four hundred eighty-two".