20254081757197 has 2 divisors, whose sum is σ = 20254081757198. Its totient is φ = 20254081757196.

The previous prime is 20254081757179. The next prime is 20254081757227. The reversal of 20254081757197 is 79175718045202.

It is a happy number.

Together with previous prime (20254081757179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17317865852676 + 2936215904521 = 4161474^2 + 1713539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20254081757197 - 2⁴³ = 11457988734989 is a prime.

It is a super-2 number, since 2×20254081757197² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20254081754197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10127040878598 + 10127040878599.

It is an arithmetic number, because the mean of its divisors is an integer number (10127040878599).

Almost surely, 2^{20254081757197} is an apocalyptic number.

It is an amenable number.

20254081757197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20254081757197 is an equidigital number, since it uses as much as digits as its factorization.

20254081757197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9878400, while the sum is 58.

The spelling of 20254081757197 in words is "twenty trillion, two hundred fifty-four billion, eighty-one million, seven hundred fifty-seven thousand, one hundred ninety-seven".