21169341 has 6 divisors (see below), whose sum is σ = 30577950. Its totient is φ = 14112888.

The previous prime is 21169331. The next prime is 21169367. The reversal of 21169341 is 14396112.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 3980025 = 4146^2 + 1995^2 .

It is not a de Polignac number, because 21169341 - 2⁶ = 21169277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21169321) 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 5 ways as a sum of consecutive naturals, for example, 1176066 + ... + 1176083.

It is an arithmetic number, because the mean of its divisors is an integer number (5096325).

Almost surely, 2^21169341 is an apocalyptic number.

It is an amenable number.

21169341 is a deficient number, since it is larger than the sum of its proper divisors (9408609).

21169341 is a wasteful number, since it uses less digits than its factorization.

21169341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352155 (or 2352152 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 21169341 is about 4601.0152140587. The cubic root of 21169341 is about 276.6320188543.

The spelling of 21169341 in words is "twenty-one million, one hundred sixty-nine thousand, three hundred forty-one".