11536821 has 12 divisors (see below), whose sum is σ = 16740672. Its totient is φ = 7655976.

The previous prime is 11536813. The next prime is 11536841. The reversal of 11536821 is 12863511.

It is not a de Polignac number, because 11536821 - 2³ = 11536813 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 (11536841) 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, 781 + ... + 4866.

It is an arithmetic number, because the mean of its divisors is an integer number (1395056).

Almost surely, 2^11536821 is an apocalyptic number.

It is an amenable number.

11536821 is a deficient number, since it is larger than the sum of its proper divisors (5203851).

11536821 is a wasteful number, since it uses less digits than its factorization.

11536821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880 (or 5877 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11536821 is about 3396.5896131267. The cubic root of 11536821 is about 225.9585182435.

The spelling of 11536821 in words is "eleven million, five hundred thirty-six thousand, eight hundred twenty-one".