11630021 has 12 divisors (see below), whose sum is σ = 12790092. Its totient is φ = 10512384.

The previous prime is 11630011. The next prime is 11630029. The reversal of 11630021 is 12003611.

It can be written as a sum of positive squares in 2 ways, for example, as 7365796 + 4264225 = 2714^2 + 2065^2 .

It is not a de Polignac number, because 11630021 - 2¹⁰ = 11628997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11629978 and 11630005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11630029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45125 + ... + 45381.

It is an arithmetic number, because the mean of its divisors is an integer number (1065841).

Almost surely, 2^11630021 is an apocalyptic number.

It is an amenable number.

11630021 is a deficient number, since it is larger than the sum of its proper divisors (1160071).

11630021 is an equidigital number, since it uses as much as digits as its factorization.

11630021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 11630021 is about 3410.2816599219. The cubic root of 11630021 is about 226.5653543295.

Adding to 11630021 its reverse (12003611), we get a palindrome (23633632).

The spelling of 11630021 in words is "eleven million, six hundred thirty thousand, twenty-one".