20315445210361 has 4 divisors (see below), whose sum is σ = 23217651668992. Its totient is φ = 17413238751732.

The previous prime is 20315445210329. The next prime is 20315445210367. The reversal of 20315445210361 is 16301254451302.

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 not a de Polignac number, because 20315445210361 - 2⁵ = 20315445210329 is a prime.

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 20315445210361.

It is not an unprimeable number, because it can be changed into a prime (20315445210367) 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, 1451103229305 + ... + 1451103229318.

It is an arithmetic number, because the mean of its divisors is an integer number (5804412917248).

Almost surely, 2^{20315445210361} is an apocalyptic number.

It is an amenable number.

20315445210361 is a deficient number, since it is larger than the sum of its proper divisors (2902206458631).

20315445210361 is an equidigital number, since it uses as much as digits as its factorization.

20315445210361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902206458630.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 20315445210361 its reverse (16301254451302), we get a palindrome (36616699661663).

The spelling of 20315445210361 in words is "twenty trillion, three hundred fifteen billion, four hundred forty-five million, two hundred ten thousand, three hundred sixty-one".