11813805 has 24 divisors (see below), whose sum is σ = 20730528. Its totient is φ = 6222816.

The previous prime is 11813803. The next prime is 11813807. The reversal of 11813805 is 50831811.

11813805 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11813803) and next prime (11813807).

It is not a de Polignac number, because 11813805 - 2¹ = 11813803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11813803) 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, 2154 + ... + 5316.

It is an arithmetic number, because the mean of its divisors is an integer number (863772).

Almost surely, 2^11813805 is an apocalyptic number.

11813805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11813805 is a deficient number, since it is larger than the sum of its proper divisors (8916723).

11813805 is a wasteful number, since it uses less digits than its factorization.

11813805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3254 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 11813805 is about 3437.1216155382. The cubic root of 11813805 is about 227.7525593514.

The spelling of 11813805 in words is "eleven million, eight hundred thirteen thousand, eight hundred five".