21944694 has 8 divisors (see below), whose sum is σ = 43889400. Its totient is φ = 7314896.

The previous prime is 21944693. The next prime is 21944701. The reversal of 21944694 is 49644912.

It is a sphenic number, since it is the product of 3 distinct primes.

21944694 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21944693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1828719 + ... + 1828730.

It is an arithmetic number, because the mean of its divisors is an integer number (5486175).

Almost surely, 2^21944694 is an apocalyptic number.

21944694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21944694 is a wasteful number, since it uses less digits than its factorization.

21944694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657454.

The product of its digits is 62208, while the sum is 39.

The square root of 21944694 is about 4684.5164104740. The cubic root of 21944694 is about 279.9689336281.

The spelling of 21944694 in words is "twenty-one million, nine hundred forty-four thousand, six hundred ninety-four".