20033009 has 2 divisors, whose sum is σ = 20033010. Its totient is φ = 20033008.

The previous prime is 20032967. The next prime is 20033029. The reversal of 20033009 is 90033002.

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., 19998784 + 34225 = 4472^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 20033009 - 2²⁴ = 3255793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20033029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016504 + 10016505.

It is an arithmetic number, because the mean of its divisors is an integer number (10016505).

Almost surely, 2^20033009 is an apocalyptic number.

It is an amenable number.

20033009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20033009 is an equidigital number, since it uses as much as digits as its factorization.

20033009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 20033009 is about 4475.8249518943. The cubic root of 20033009 is about 271.5910132640.

The spelling of 20033009 in words is "twenty million, thirty-three thousand, nine".