21844794 has 16 divisors (see below), whose sum is σ = 45989280. Its totient is φ = 6898320.

The previous prime is 21844793. The next prime is 21844807. The reversal of 21844794 is 49744812.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21844793) 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, 95697 + ... + 95924.

It is an arithmetic number, because the mean of its divisors is an integer number (2874330).

Almost surely, 2^21844794 is an apocalyptic number.

21844794 is an abundant number, since it is smaller than the sum of its proper divisors (24144486).

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

21844794 is a wasteful number, since it uses less digits than its factorization.

21844794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191645.

The product of its digits is 64512, while the sum is 39.

The square root of 21844794 is about 4673.8414607259. The cubic root of 21844794 is about 279.5434481544.

The spelling of 21844794 in words is "twenty-one million, eight hundred forty-four thousand, seven hundred ninety-four".