20038609 has 2 divisors, whose sum is σ = 20038610. Its totient is φ = 20038608.

The previous prime is 20038541. The next prime is 20038619. The reversal of 20038609 is 90683002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14085009 + 5953600 = 3753^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 20038609 - 2⁷ = 20038481 is a prime.

It is not a weakly prime, because it can be changed into another prime (20038619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10019304 + 10019305.

It is an arithmetic number, because the mean of its divisors is an integer number (10019305).

Almost surely, 2^20038609 is an apocalyptic number.

It is an amenable number.

20038609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20038609 is an equidigital number, since it uses as much as digits as its factorization.

20038609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20038609 is about 4476.4504911816. The cubic root of 20038609 is about 271.6163176334.

It can be divided in two parts, 200 and 38609, that added together give a square (38809 = 197²).

The spelling of 20038609 in words is "twenty million, thirty-eight thousand, six hundred nine".