21441704 has 16 divisors (see below), whose sum is σ = 41951520. Its totient is φ = 10254640.

The previous prime is 21441703. The next prime is 21441713. The reversal of 21441704 is 40714412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 21441704.

It is not an unprimeable number, because it can be changed into a prime (21441703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58082 + ... + 58449.

It is an arithmetic number, because the mean of its divisors is an integer number (2621970).

Almost surely, 2^21441704 is an apocalyptic number.

It is an amenable number.

21441704 is a deficient number, since it is larger than the sum of its proper divisors (20509816).

21441704 is a wasteful number, since it uses less digits than its factorization.

21441704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116560 (or 116556 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 21441704 is about 4630.5187614348. The cubic root of 21441704 is about 277.8133419117.

The spelling of 21441704 in words is "twenty-one million, four hundred forty-one thousand, seven hundred four".