26531813 has 12 divisors (see below), whose sum is σ = 33135072. Its totient is φ = 20638920.

The previous prime is 26531807. The next prime is 26531821. The reversal of 26531813 is 31813562.

It is not a de Polignac number, because 26531813 - 2⁶ = 26531749 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26531803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44906 + ... + 45492.

It is an arithmetic number, because the mean of its divisors is an integer number (2761256).

Almost surely, 2^26531813 is an apocalyptic number.

It is an amenable number.

26531813 is a deficient number, since it is larger than the sum of its proper divisors (6603259).

26531813 is an frugal number, since it uses more digits than its factorization.

26531813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 605 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 26531813 is about 5150.9040953992. The cubic root of 26531813 is about 298.2558535692.

The spelling of 26531813 in words is "twenty-six million, five hundred thirty-one thousand, eight hundred thirteen".