21844914 has 32 divisors (see below), whose sum is σ = 53773440. Its totient is φ = 5761152.

The previous prime is 21844913. The next prime is 21844919. The reversal of 21844914 is 41944812.

21844914 is a modest number, since divided by 4914 gives 2184 as remainder.

It is not an unprimeable number, because it can be changed into a prime (21844913) 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 15 ways as a sum of consecutive naturals, for example, 19459 + ... + 20550.

It is an arithmetic number, because the mean of its divisors is an integer number (1680420).

Almost surely, 2^21844914 is an apocalyptic number.

21844914 is an abundant number, since it is smaller than the sum of its proper divisors (31928526).

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

21844914 is a wasteful number, since it uses less digits than its factorization.

21844914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40034.

The product of its digits is 9216, while the sum is 33.

The square root of 21844914 is about 4673.8542981141. The cubic root of 21844914 is about 279.5439600254.

It can be divided in two parts, 2184 and 4914, that multiplied together give a square (10732176 = 3276²).

The spelling of 21844914 in words is "twenty-one million, eight hundred forty-four thousand, nine hundred fourteen".