20833349 has 4 divisors (see below), whose sum is σ = 20842764. Its totient is φ = 20823936.

The previous prime is 20833343. The next prime is 20833357. The reversal of 20833349 is 94333802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11682724 + 9150625 = 3418^2 + 3025^2 .

It is a cyclic number.

It is not a de Polignac number, because 20833349 - 2⁸ = 20833093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20833343) 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 3 ways as a sum of consecutive naturals, for example, 629 + ... + 6485.

It is an arithmetic number, because the mean of its divisors is an integer number (5210691).

Almost surely, 2^20833349 is an apocalyptic number.

It is an amenable number.

20833349 is a deficient number, since it is larger than the sum of its proper divisors (9415).

20833349 is an equidigital number, since it uses as much as digits as its factorization.

20833349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9414.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 20833349 is about 4564.3563620734. The cubic root of 20833349 is about 275.1606730481.

The spelling of 20833349 in words is "twenty million, eight hundred thirty-three thousand, three hundred forty-nine".