20630131431361 has 4 divisors (see below), whose sum is σ = 20632762497924. Its totient is φ = 20627500364800.

The previous prime is 20630131431347. The next prime is 20630131431373. The reversal of 20630131431361 is 16313413103602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8707309164225 + 11922822267136 = 2950815^2 + 3452944^2 .

It is a cyclic number.

It is not a de Polignac number, because 20630131431361 - 2⁹ = 20630131430849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20630131431331) 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, 1315521520 + ... + 1315537201.

It is an arithmetic number, because the mean of its divisors is an integer number (5158190624481).

Almost surely, 2^{20630131431361} is an apocalyptic number.

It is an amenable number.

20630131431361 is a deficient number, since it is larger than the sum of its proper divisors (2631066563).

20630131431361 is an equidigital number, since it uses as much as digits as its factorization.

20630131431361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631066562.

The product of its (nonzero) digits is 23328, while the sum is 34.

Adding to 20630131431361 its reverse (16313413103602), we get a palindrome (36943544534963).

The spelling of 20630131431361 in words is "twenty trillion, six hundred thirty billion, one hundred thirty-one million, four hundred thirty-one thousand, three hundred sixty-one".