20033389 has 2 divisors, whose sum is σ = 20033390. Its totient is φ = 20033388.

The previous prime is 20033383. The next prime is 20033393. The reversal of 20033389 is 98333002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15760900 + 4272489 = 3970^2 + 2067^2 .

It is a cyclic number.

It is not a de Polignac number, because 20033389 - 2³ = 20033381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20033381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016694 + 10016695.

It is an arithmetic number, because the mean of its divisors is an integer number (10016695).

Almost surely, 2^20033389 is an apocalyptic number.

It is an amenable number.

20033389 is a deficient number, since it is larger than the sum of its proper divisors (1).

20033389 is an equidigital number, since it uses as much as digits as its factorization.

20033389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20033389 is about 4475.8674019680. The cubic root of 20033389 is about 271.5927304953.

The spelling of 20033389 in words is "twenty million, thirty-three thousand, three hundred eighty-nine".