21841922 has 8 divisors (see below), whose sum is σ = 32783616. Its totient is φ = 10914052.

The previous prime is 21841913. The next prime is 21842021. The reversal of 21841922 is 22914812.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663 + ... + 7125.

It is an arithmetic number, because the mean of its divisors is an integer number (4097952).

Almost surely, 2^21841922 is an apocalyptic number.

21841922 is a deficient number, since it is larger than the sum of its proper divisors (10941694).

21841922 is a wasteful number, since it uses less digits than its factorization.

21841922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912.

The product of its digits is 2304, while the sum is 29.

The square root of 21841922 is about 4673.5342087119. The cubic root of 21841922 is about 279.5311968148.

The spelling of 21841922 in words is "twenty-one million, eight hundred forty-one thousand, nine hundred twenty-two".