26544013 has 4 divisors (see below), whose sum is σ = 26677600. Its totient is φ = 26410428.

The previous prime is 26543999. The next prime is 26544017. The reversal of 26544013 is 31044562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31044562 = 2 ⋅15522281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26544013 is a prime.

It is a super-2 number, since 2×26544013² = 1409169252288338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26544017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66495 + ... + 66892.

It is an arithmetic number, because the mean of its divisors is an integer number (6669400).

Almost surely, 2^26544013 is an apocalyptic number.

It is an amenable number.

26544013 is a deficient number, since it is larger than the sum of its proper divisors (133587).

26544013 is a wasteful number, since it uses less digits than its factorization.

26544013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133586.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 26544013 is about 5152.0882174124. The cubic root of 26544013 is about 298.3015617640.

Adding to 26544013 its reverse (31044562), we get a palindrome (57588575).

The spelling of 26544013 in words is "twenty-six million, five hundred forty-four thousand, thirteen".