21244054 has 16 divisors (see below), whose sum is σ = 34522992. Its totient is φ = 9746208.

The previous prime is 21244001. The next prime is 21244061. The reversal of 21244054 is 45044212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2137 + ... + 6859.

It is an arithmetic number, because the mean of its divisors is an integer number (2157687).

Almost surely, 2^21244054 is an apocalyptic number.

21244054 is a deficient number, since it is larger than the sum of its proper divisors (13278938).

21244054 is a wasteful number, since it uses less digits than its factorization.

21244054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 21244054 is about 4609.1272492740. The cubic root of 21244054 is about 276.9570760686.

Adding to 21244054 its reverse (45044212), we get a palindrome (66288266).

The spelling of 21244054 in words is "twenty-one million, two hundred forty-four thousand, fifty-four".