21395041 has 4 divisors (see below), whose sum is σ = 21484800. Its totient is φ = 21305284.

The previous prime is 21395021. The next prime is 21395047. The reversal of 21395041 is 14059312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21395041 - 2¹⁹ = 20870753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21394997 and 21395015.

It is not an unprimeable number, because it can be changed into a prime (21395047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44521 + ... + 44998.

It is an arithmetic number, because the mean of its divisors is an integer number (5371200).

Almost surely, 2^21395041 is an apocalyptic number.

It is an amenable number.

21395041 is a deficient number, since it is larger than the sum of its proper divisors (89759).

21395041 is an equidigital number, since it uses as much as digits as its factorization.

21395041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89758.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21395041 is about 4625.4773807684. The cubic root of 21395041 is about 277.6116629861.

The spelling of 21395041 in words is "twenty-one million, three hundred ninety-five thousand, forty-one".