20001361 has 2 divisors, whose sum is σ = 20001362. Its totient is φ = 20001360.

The previous prime is 20001341. The next prime is 20001389. The reversal of 20001361 is 16310002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13549761 + 6451600 = 3681^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001361 - 2¹⁷ = 19870289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000680 + 10000681.

It is an arithmetic number, because the mean of its divisors is an integer number (10000681).

Almost surely, 2^20001361 is an apocalyptic number.

It is an amenable number.

20001361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001361 is an equidigital number, since it uses as much as digits as its factorization.

20001361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20001361 is about 4472.2881168368. The cubic root of 20001361 is about 271.4479187238.

Adding to 20001361 its reverse (16310002), we get a palindrome (36311363).

The spelling of 20001361 in words is "twenty million, one thousand, three hundred sixty-one".