11800013 has 8 divisors (see below), whose sum is σ = 12322200. Its totient is φ = 11285568.

The previous prime is 11800001. The next prime is 11800037. The reversal of 11800013 is 31000811.

11800013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3020644 + 8779369 = 1738^2 + 2963^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11800013 - 2¹⁶ = 11734477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11800043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295 + ... + 5027.

It is an arithmetic number, because the mean of its divisors is an integer number (1540275).

Almost surely, 2^11800013 is an apocalyptic number.

It is an amenable number.

11800013 is a deficient number, since it is larger than the sum of its proper divisors (522187).

11800013 is a wasteful number, since it uses less digits than its factorization.

11800013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 11800013 is about 3435.1146996862. The cubic root of 11800013 is about 227.6638951016.

Adding to 11800013 its reverse (31000811), we get a palindrome (42800824).

The spelling of 11800013 in words is "eleven million, eight hundred thousand, thirteen".