20065201361 has 4 divisors (see below), whose sum is σ = 20070514800. Its totient is φ = 20059887924.

The previous prime is 20065201333. The next prime is 20065201367. The reversal of 20065201361 is 16310256002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20065201361 is a prime.

It is a super-2 number, since 2×20065201361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20065201361.

It is not an unprimeable number, because it can be changed into a prime (20065201367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2651051 + ... + 2658608.

It is an arithmetic number, because the mean of its divisors is an integer number (5017628700).

Almost surely, 2^20065201361 is an apocalyptic number.

It is an amenable number.

20065201361 is a deficient number, since it is larger than the sum of its proper divisors (5313439).

20065201361 is an equidigital number, since it uses as much as digits as its factorization.

20065201361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5313438.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 20065201361 its reverse (16310256002), we get a palindrome (36375457363).

The spelling of 20065201361 in words is "twenty billion, sixty-five million, two hundred one thousand, three hundred sixty-one".