21444954 has 16 divisors (see below), whose sum is σ = 43333248. Its totient is φ = 7074432.

The previous prime is 21444953. The next prime is 21444961. The reversal of 21444954 is 45944412.

It is not an unprimeable number, because it can be changed into a prime (21444953) 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, 17842 + ... + 19005.

It is an arithmetic number, because the mean of its divisors is an integer number (2708328).

Almost surely, 2^21444954 is an apocalyptic number.

21444954 is an abundant number, since it is smaller than the sum of its proper divisors (21888294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21444954 is a wasteful number, since it uses less digits than its factorization.

21444954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36949.

The product of its digits is 23040, while the sum is 33.

The square root of 21444954 is about 4630.8696807403. The cubic root of 21444954 is about 277.8273776081.

The spelling of 21444954 in words is "twenty-one million, four hundred forty-four thousand, nine hundred fifty-four".