21341895 has 16 divisors (see below), whose sum is σ = 34208352. Its totient is φ = 11361920.

The previous prime is 21341867. The next prime is 21341897. The reversal of 21341895 is 59814312.

It is not a de Polignac number, because 21341895 - 2⁵ = 21341863 is a prime.

It is a super-4 number, since 4×21341895⁴ (a number of 30 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341897) 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 15 ways as a sum of consecutive naturals, for example, 11449 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (2138022).

Almost surely, 2^21341895 is an apocalyptic number.

21341895 is a deficient number, since it is larger than the sum of its proper divisors (12866457).

21341895 is a wasteful number, since it uses less digits than its factorization.

21341895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562.

The product of its digits is 8640, while the sum is 33.

The square root of 21341895 is about 4619.7288881492. The cubic root of 21341895 is about 277.3816068287.

The spelling of 21341895 in words is "twenty-one million, three hundred forty-one thousand, eight hundred ninety-five".