11813500 has 24 divisors (see below), whose sum is σ = 25801776. Its totient is φ = 4725200.

The previous prime is 11813491. The next prime is 11813509. The reversal of 11813500 is 531811.

It is an interprime number because it is at equal distance from previous prime (11813491) and next prime (11813509).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11813509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11314 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (1075074).

Almost surely, 2^11813500 is an apocalyptic number.

11813500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11813500 is an abundant number, since it is smaller than the sum of its proper divisors (13988276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11813500 is a wasteful number, since it uses less digits than its factorization.

11813500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23646 (or 23634 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 11813500 is about 3437.0772467316. The cubic root of 11813500 is about 227.7505993527.

The spelling of 11813500 in words is "eleven million, eight hundred thirteen thousand, five hundred".