20207389 has 2 divisors, whose sum is σ = 20207390. Its totient is φ = 20207388.

The previous prime is 20207359. The next prime is 20207417. The reversal of 20207389 is 98370202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13264164 + 6943225 = 3642^2 + 2635^2 .

It is a cyclic number.

It is not a de Polignac number, because 20207389 - 2⁵ = 20207357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20207389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20207309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103694 + 10103695.

It is an arithmetic number, because the mean of its divisors is an integer number (10103695).

Almost surely, 2^20207389 is an apocalyptic number.

It is an amenable number.

20207389 is a deficient number, since it is larger than the sum of its proper divisors (1).

20207389 is an equidigital number, since it uses as much as digits as its factorization.

20207389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20207389 is about 4495.2629511520. The cubic root of 20207389 is about 272.3767711488.

It can be divided in two parts, 2020 and 7389, that added together give a square (9409 = 97²).

The spelling of 20207389 in words is "twenty million, two hundred seven thousand, three hundred eighty-nine".