20271041272457 has 2 divisors, whose sum is σ = 20271041272458. Its totient is φ = 20271041272456.

The previous prime is 20271041272453. The next prime is 20271041272507. The reversal of 20271041272457 is 75427214017202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11736352298896 + 8534688973561 = 3425836^2 + 2921419^2 .

It is a cyclic number.

It is not a de Polignac number, because 20271041272457 - 2² = 20271041272453 is a prime.

It is a super-2 number, since 2×20271041272457² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20271041272453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10135520636228 + 10135520636229.

It is an arithmetic number, because the mean of its divisors is an integer number (10135520636229).

Almost surely, 2^{20271041272457} is an apocalyptic number.

It is an amenable number.

20271041272457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20271041272457 is an equidigital number, since it uses as much as digits as its factorization.

20271041272457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 439040, while the sum is 44.

Adding to 20271041272457 its reverse (75427214017202), we get a palindrome (95698255289659).

The spelling of 20271041272457 in words is "twenty trillion, two hundred seventy-one billion, forty-one million, two hundred seventy-two thousand, four hundred fifty-seven".