21941841 has 8 divisors (see below), whose sum is σ = 29808000. Its totient is φ = 14351792.

The previous prime is 21941837. The next prime is 21941863. The reversal of 21941841 is 14814912.

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

It is a cyclic number.

It is not a de Polignac number, because 21941841 - 2² = 21941837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21941799 and 21941808.

It is not an unprimeable number, because it can be changed into a prime (21941041) 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, 68841 + ... + 69158.

It is an arithmetic number, because the mean of its divisors is an integer number (3726000).

Almost surely, 2^21941841 is an apocalyptic number.

It is an amenable number.

21941841 is a deficient number, since it is larger than the sum of its proper divisors (7866159).

21941841 is a wasteful number, since it uses less digits than its factorization.

21941841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138055.

The product of its digits is 2304, while the sum is 30.

The square root of 21941841 is about 4684.2118867532. The cubic root of 21941841 is about 279.9568003081.

The spelling of 21941841 in words is "twenty-one million, nine hundred forty-one thousand, eight hundred forty-one".