20601439 has 2 divisors, whose sum is σ = 20601440. Its totient is φ = 20601438.

The previous prime is 20601421. The next prime is 20601473. The reversal of 20601439 is 93410602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20601439 - 2¹¹ = 20599391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20601499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300719 + 10300720.

It is an arithmetic number, because the mean of its divisors is an integer number (10300720).

Almost surely, 2^20601439 is an apocalyptic number.

20601439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20601439 is an equidigital number, since it uses as much as digits as its factorization.

20601439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20601439 is about 4538.8808091863. The cubic root of 20601439 is about 274.1358615479.

The spelling of 20601439 in words is "twenty million, six hundred one thousand, four hundred thirty-nine".