21464041 has 4 divisors (see below), whose sum is σ = 21705300. Its totient is φ = 21222784.

The previous prime is 21464029. The next prime is 21464057. The reversal of 21464041 is 14046412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13169641 + 8294400 = 3629^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 21464041 - 2⁹ = 21463529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21464941) 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 3 ways as a sum of consecutive naturals, for example, 120496 + ... + 120673.

It is an arithmetic number, because the mean of its divisors is an integer number (5426325).

Almost surely, 2^21464041 is an apocalyptic number.

It is an amenable number.

21464041 is a deficient number, since it is larger than the sum of its proper divisors (241259).

21464041 is an equidigital number, since it uses as much as digits as its factorization.

21464041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241258.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 21464041 is about 4632.9300663835. The cubic root of 21464041 is about 277.9097795671.

The spelling of 21464041 in words is "twenty-one million, four hundred sixty-four thousand, forty-one".