26813021 has 2 divisors, whose sum is σ = 26813022. Its totient is φ = 26813020.

The previous prime is 26812991. The next prime is 26813041. The reversal of 26813021 is 12031862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26522500 + 290521 = 5150^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 26813021 - 2⁶ = 26812957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26813041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13406510 + 13406511.

It is an arithmetic number, because the mean of its divisors is an integer number (13406511).

Almost surely, 2^26813021 is an apocalyptic number.

It is an amenable number.

26813021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26813021 is an equidigital number, since it uses as much as digits as its factorization.

26813021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 26813021 is about 5178.1291022917. The cubic root of 26813021 is about 299.3058804172.

Adding to 26813021 its reverse (12031862), we get a palindrome (38844883).

The spelling of 26813021 in words is "twenty-six million, eight hundred thirteen thousand, twenty-one".