11380821 has 16 divisors (see below), whose sum is σ = 15787968. Its totient is φ = 7286400.

The previous prime is 11380801. The next prime is 11380843. The reversal of 11380821 is 12808311.

11380821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11380821 - 2⁶ = 11380757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11380791 and 11380800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11380801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7551 + ... + 8931.

It is an arithmetic number, because the mean of its divisors is an integer number (986748).

Almost surely, 2^11380821 is an apocalyptic number.

It is an amenable number.

11380821 is a deficient number, since it is larger than the sum of its proper divisors (4407147).

11380821 is a wasteful number, since it uses less digits than its factorization.

11380821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 11380821 is about 3373.5472428884. The cubic root of 11380821 is about 224.9354283843.

The spelling of 11380821 in words is "eleven million, three hundred eighty thousand, eight hundred twenty-one".