21095329 has 4 divisors (see below), whose sum is σ = 21213360. Its totient is φ = 20977300.

The previous prime is 21095311. The next prime is 21095357. The reversal of 21095329 is 92359012.

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 21095329 - 2⁷ = 21095201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21095329.

It is not an unprimeable number, because it can be changed into a prime (21095429) 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, 58747 + ... + 59104.

It is an arithmetic number, because the mean of its divisors is an integer number (5303340).

Almost surely, 2^21095329 is an apocalyptic number.

It is an amenable number.

21095329 is a deficient number, since it is larger than the sum of its proper divisors (118031).

21095329 is a wasteful number, since it uses less digits than its factorization.

21095329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118030.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 21095329 is about 4592.9651642485. The cubic root of 21095329 is about 276.3092565498.

The spelling of 21095329 in words is "twenty-one million, ninety-five thousand, three hundred twenty-nine".