26181013 has 2 divisors, whose sum is σ = 26181014. Its totient is φ = 26181012.

The previous prime is 26181007. The next prime is 26181047. The reversal of 26181013 is 31018162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21883684 + 4297329 = 4678^2 + 2073^2 .

It is a cyclic number.

It is not a de Polignac number, because 26181013 - 2¹³ = 26172821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26181053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13090506 + 13090507.

It is an arithmetic number, because the mean of its divisors is an integer number (13090507).

Almost surely, 2^26181013 is an apocalyptic number.

It is an amenable number.

26181013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26181013 is an equidigital number, since it uses as much as digits as its factorization.

26181013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 26181013 is about 5116.7385119820. The cubic root of 26181013 is about 296.9355179008.

Adding to 26181013 its reverse (31018162), we get a palindrome (57199175).

The spelling of 26181013 in words is "twenty-six million, one hundred eighty-one thousand, thirteen".