21446105 has 8 divisors (see below), whose sum is σ = 25766664. Its totient is φ = 17136000.

The previous prime is 21446101. The next prime is 21446107. The reversal of 21446105 is 50164412.

It can be written as a sum of positive squares in 4 ways, for example, as 175561 + 21270544 = 419^2 + 4612^2 .

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

It is not a de Polignac number, because 21446105 - 2² = 21446101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21446101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005 + ... + 7205.

It is an arithmetic number, because the mean of its divisors is an integer number (3220833).

Almost surely, 2^21446105 is an apocalyptic number.

It is an amenable number.

21446105 is a deficient number, since it is larger than the sum of its proper divisors (4320559).

21446105 is a wasteful number, since it uses less digits than its factorization.

21446105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5227.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21446105 is about 4630.9939537857. The cubic root of 21446105 is about 277.8323480640.

The spelling of 21446105 in words is "twenty-one million, four hundred forty-six thousand, one hundred five".