21003240230 has 16 divisors (see below), whose sum is σ = 43206665760. Its totient is φ = 7201110912.

The previous prime is 21003240077. The next prime is 21003240233. The reversal of 21003240230 is 3204230012.

It is a super-2 number, since 2×21003240230² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003240199 and 21003240208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003240233) 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, 150023075 + ... + 150023214.

It is an arithmetic number, because the mean of its divisors is an integer number (2700416610).

Almost surely, 2^21003240230 is an apocalyptic number.

21003240230 is an abundant number, since it is smaller than the sum of its proper divisors (22203425530).

21003240230 is a wasteful number, since it uses less digits than its factorization.

21003240230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300046303.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21003240230 its reverse (3204230012), we get a palindrome (24207470242).

The spelling of 21003240230 in words is "twenty-one billion, three million, two hundred forty thousand, two hundred thirty".