26845821 has 6 divisors (see below), whose sum is σ = 38777310. Its totient is φ = 17897208.

The previous prime is 26845813. The next prime is 26845829. The reversal of 26845821 is 12854862.

It is an interprime number because it is at equal distance from previous prime (26845813) and next prime (26845829).

It can be written as a sum of positive squares in only one way, i.e., 25613721 + 1232100 = 5061^2 + 1110^2 .

It is not a de Polignac number, because 26845821 - 2³ = 26845813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26845829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1491426 + ... + 1491443.

It is an arithmetic number, because the mean of its divisors is an integer number (6462885).

Almost surely, 2^26845821 is an apocalyptic number.

It is an amenable number.

26845821 is a deficient number, since it is larger than the sum of its proper divisors (11931489).

26845821 is a wasteful number, since it uses less digits than its factorization.

26845821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982875 (or 2982872 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 26845821 is about 5181.2953013701. The cubic root of 26845821 is about 299.4278762751.

The spelling of 26845821 in words is "twenty-six million, eight hundred forty-five thousand, eight hundred twenty-one".