20267103457 has 2 divisors, whose sum is σ = 20267103458. Its totient is φ = 20267103456.

The previous prime is 20267103419. The next prime is 20267103463. The reversal of 20267103457 is 75430176202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18147053521 + 2120049936 = 134711^2 + 46044^2 .

It is a cyclic number.

It is not a de Polignac number, because 20267103457 - 2¹¹ = 20267101409 is a prime.

It is not a weakly prime, because it can be changed into another prime (20267113457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10133551728 + 10133551729.

It is an arithmetic number, because the mean of its divisors is an integer number (10133551729).

Almost surely, 2^20267103457 is an apocalyptic number.

It is an amenable number.

20267103457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20267103457 is an equidigital number, since it uses as much as digits as its factorization.

20267103457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 37.

Adding to 20267103457 its reverse (75430176202), we get a palindrome (95697279659).

The spelling of 20267103457 in words is "twenty billion, two hundred sixty-seven million, one hundred three thousand, four hundred fifty-seven".