11535813 has 24 divisors (see below), whose sum is σ = 17372160. Its totient is φ = 7368480.

The previous prime is 11535787. The next prime is 11535829. The reversal of 11535813 is 31853511.

It is not a de Polignac number, because 11535813 - 2⁵ = 11535781 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 (11535833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48148 + ... + 48386.

It is an arithmetic number, because the mean of its divisors is an integer number (723840).

Almost surely, 2^11535813 is an apocalyptic number.

It is an amenable number.

11535813 is a deficient number, since it is larger than the sum of its proper divisors (5836347).

11535813 is a wasteful number, since it uses less digits than its factorization.

11535813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 446 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 11535813 is about 3396.4412257538. The cubic root of 11535813 is about 225.9519372041.

It can be divided in two parts, 11 and 535813, that added together give a square (535824 = 732²).

The spelling of 11535813 in words is "eleven million, five hundred thirty-five thousand, eight hundred thirteen".