2026512181 has 2 divisors, whose sum is σ = 2026512182. Its totient is φ = 2026512180.

The previous prime is 2026512161. The next prime is 2026512209. The reversal of 2026512181 is 1812156202.

It is an a-pointer prime, because the next prime (2026512209) can be obtained adding 2026512181 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1926332100 + 100180081 = 43890^2 + 10009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2026512181 is a prime.

It is a super-2 number, since 2×2026512181² = 8213503239482753522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2026512121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013256090 + 1013256091.

It is an arithmetic number, because the mean of its divisors is an integer number (1013256091).

Almost surely, 2^2026512181 is an apocalyptic number.

It is an amenable number.

2026512181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2026512181 is an equidigital number, since it uses as much as digits as its factorization.

2026512181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 2026512181 is about 45016.7988755309. The cubic root of 2026512181 is about 1265.4638388184.

Adding to 2026512181 its reverse (1812156202), we get a palindrome (3838668383).

It can be divided in two parts, 20 and 26512181, that added together give a square (26512201 = 5149²).

The spelling of 2026512181 in words is "two billion, twenty-six million, five hundred twelve thousand, one hundred eighty-one".