20833889 has 2 divisors, whose sum is σ = 20833890. Its totient is φ = 20833888.

The previous prime is 20833877. The next prime is 20833909. The reversal of 20833889 is 98833802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10942864 + 9891025 = 3308^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 20833889 - 2¹⁶ = 20768353 is a prime.

It is not a weakly prime, because it can be changed into another prime (20833859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10416944 + 10416945.

It is an arithmetic number, because the mean of its divisors is an integer number (10416945).

Almost surely, 2^20833889 is an apocalyptic number.

It is an amenable number.

20833889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20833889 is an equidigital number, since it uses as much as digits as its factorization.

20833889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 20833889 is about 4564.4155157041. The cubic root of 20833889 is about 275.1630504140.

The spelling of 20833889 in words is "twenty million, eight hundred thirty-three thousand, eight hundred eighty-nine".