21113230 has 16 divisors (see below), whose sum is σ = 38068560. Its totient is φ = 8430912.

The previous prime is 21113221. The next prime is 21113231. The reversal of 21113230 is 3231112.

It is a self number, because there is not a number n which added to its sum of digits gives 21113230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113231) 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, 5962 + ... + 8818.

It is an arithmetic number, because the mean of its divisors is an integer number (2379285).

Almost surely, 2^21113230 is an apocalyptic number.

21113230 is a deficient number, since it is larger than the sum of its proper divisors (16955330).

21113230 is a wasteful number, since it uses less digits than its factorization.

21113230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 21113230 is about 4594.9134921128. The cubic root of 21113230 is about 276.3873909650.

Adding to 21113230 its reverse (3231112), we get a palindrome (24344342).

The spelling of 21113230 in words is "twenty-one million, one hundred thirteen thousand, two hundred thirty".