26018306213 has 4 divisors (see below), whose sum is σ = 26257006380. Its totient is φ = 25779606048.

The previous prime is 26018306129. The next prime is 26018306221. The reversal of 26018306213 is 31260381062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31260381062 = 2 ⋅15630190531.

It can be written as a sum of positive squares in 2 ways, for example, as 13054662049 + 12963644164 = 114257^2 + 113858^2 .

It is a cyclic number.

It is not a de Polignac number, because 26018306213 - 2³⁴ = 8838437029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26018306213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26018306273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119349920 + ... + 119350137.

It is an arithmetic number, because the mean of its divisors is an integer number (6564251595).

Almost surely, 2^26018306213 is an apocalyptic number.

It is an amenable number.

26018306213 is a deficient number, since it is larger than the sum of its proper divisors (238700167).

26018306213 is a wasteful number, since it uses less digits than its factorization.

26018306213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238700166.

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 26018306213 its reverse (31260381062), we get a palindrome (57278687275).

The spelling of 26018306213 in words is "twenty-six billion, eighteen million, three hundred six thousand, two hundred thirteen".