20457741712673 has 2 divisors, whose sum is σ = 20457741712674. Its totient is φ = 20457741712672.

The previous prime is 20457741712657. The next prime is 20457741712679. The reversal of 20457741712673 is 37621714775402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17801454557329 + 2656287155344 = 4219177^2 + 1629812^2 .

It is a cyclic number.

It is not a de Polignac number, because 20457741712673 - 2⁴ = 20457741712657 is a prime.

It is a super-2 number, since 2×20457741712673² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20457741712679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228870856336 + 10228870856337.

It is an arithmetic number, because the mean of its divisors is an integer number (10228870856337).

Almost surely, 2^{20457741712673} is an apocalyptic number.

It is an amenable number.

20457741712673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20457741712673 is an equidigital number, since it uses as much as digits as its factorization.

20457741712673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13829760, while the sum is 56.

The spelling of 20457741712673 in words is "twenty trillion, four hundred fifty-seven billion, seven hundred forty-one million, seven hundred twelve thousand, six hundred seventy-three".