20136601 has 2 divisors, whose sum is σ = 20136602. Its totient is φ = 20136600.

The previous prime is 20136593. The next prime is 20136629. The reversal of 20136601 is 10663102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 4096576 = 4005^2 + 2024^2 .

It is a cyclic number.

It is not a de Polignac number, because 20136601 - 2³ = 20136593 is a prime.

It is not a weakly prime, because it can be changed into another prime (20136631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10068300 + 10068301.

It is an arithmetic number, because the mean of its divisors is an integer number (10068301).

Almost surely, 2^20136601 is an apocalyptic number.

It is an amenable number.

20136601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20136601 is an equidigital number, since it uses as much as digits as its factorization.

20136601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20136601 is about 4487.3824218580. The cubic root of 20136601 is about 272.0583469482.

Adding to 20136601 its reverse (10663102), we get a palindrome (30799703).

The spelling of 20136601 in words is "twenty million, one hundred thirty-six thousand, six hundred one".