20312625645401 has 2 divisors, whose sum is σ = 20312625645402. Its totient is φ = 20312625645400.

The previous prime is 20312625645313. The next prime is 20312625645409. The reversal of 20312625645401 is 10454652621302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13897245865801 + 6415379779600 = 3727901^2 + 2532860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312625645401 is a prime.

It is a super-2 number, since 2×20312625645401² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20312625645409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156312822700 + 10156312822701.

It is an arithmetic number, because the mean of its divisors is an integer number (10156312822701).

Almost surely, 2^{20312625645401} is an apocalyptic number.

It is an amenable number.

20312625645401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312625645401 is an equidigital number, since it uses as much as digits as its factorization.

20312625645401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 20312625645401 in words is "twenty trillion, three hundred twelve billion, six hundred twenty-five million, six hundred forty-five thousand, four hundred one".