20038009 has 2 divisors, whose sum is σ = 20038010. Its totient is φ = 20038008.

The previous prime is 20037973. The next prime is 20038049. The reversal of 20038009 is 90083002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17305600 + 2732409 = 4160^2 + 1653^2 .

It is a cyclic number.

It is not a de Polignac number, because 20038009 - 2⁷ = 20037881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20038049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10019004 + 10019005.

It is an arithmetic number, because the mean of its divisors is an integer number (10019005).

Almost surely, 2^20038009 is an apocalyptic number.

It is an amenable number.

20038009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20038009 is an equidigital number, since it uses as much as digits as its factorization.

20038009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20038009 is about 4476.3834732963. The cubic root of 20038009 is about 271.6136066764.

Adding to 20038009 its reverse (90083002), we get a palindrome (110121011).

The spelling of 20038009 in words is "twenty million, thirty-eight thousand, nine".