20425211633441 has 2 divisors, whose sum is σ = 20425211633442. Its totient is φ = 20425211633440.

The previous prime is 20425211633383. The next prime is 20425211633447. The reversal of 20425211633441 is 14433611252402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17913810765841 + 2511400867600 = 4232471^2 + 1584740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20425211633441 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20425211633395 and 20425211633404.

It is not a weakly prime, because it can be changed into another prime (20425211633447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212605816720 + 10212605816721.

It is an arithmetic number, because the mean of its divisors is an integer number (10212605816721).

Almost surely, 2^{20425211633441} is an apocalyptic number.

It is an amenable number.

20425211633441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425211633441 is an equidigital number, since it uses as much as digits as its factorization.

20425211633441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 20425211633441 its reverse (14433611252402), we get a palindrome (34858822885843).

The spelling of 20425211633441 in words is "twenty trillion, four hundred twenty-five billion, two hundred eleven million, six hundred thirty-three thousand, four hundred forty-one".