21832449 has 16 divisors (see below), whose sum is σ = 30158784. Its totient is φ = 14040000.

The previous prime is 21832441. The next prime is 21832453. The reversal of 21832449 is 94423812.

It is not a de Polignac number, because 21832449 - 2³ = 21832441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21832441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8574 + ... + 10824.

It is an arithmetic number, because the mean of its divisors is an integer number (1884924).

Almost surely, 2^21832449 is an apocalyptic number.

It is an amenable number.

21832449 is a deficient number, since it is larger than the sum of its proper divisors (8326335).

21832449 is a wasteful number, since it uses less digits than its factorization.

21832449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368.

The product of its digits is 13824, while the sum is 33.

The square root of 21832449 is about 4672.5206259577. The cubic root of 21832449 is about 279.4907794019.

The spelling of 21832449 in words is "twenty-one million, eight hundred thirty-two thousand, four hundred forty-nine".