21995295353 has 4 divisors (see below), whose sum is σ = 22012203108. Its totient is φ = 21978387600.

The previous prime is 21995295341. The next prime is 21995295383. The reversal of 21995295353 is 35359259912.

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 6829865449 + 15165429904 = 82643^2 + 123148^2 .

It is a cyclic number.

It is not a de Polignac number, because 21995295353 - 2³⁴ = 4815426169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21995295295 and 21995295304.

It is not an unprimeable number, because it can be changed into a prime (21995295313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8451926 + ... + 8454527.

It is an arithmetic number, because the mean of its divisors is an integer number (5503050777).

Almost surely, 2^21995295353 is an apocalyptic number.

It is an amenable number.

21995295353 is a deficient number, since it is larger than the sum of its proper divisors (16907755).

21995295353 is a wasteful number, since it uses less digits than its factorization.

21995295353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16907754.

The product of its digits is 3280500, while the sum is 53.

The spelling of 21995295353 in words is "twenty-one billion, nine hundred ninety-five million, two hundred ninety-five thousand, three hundred fifty-three".