21030130232 has 8 divisors (see below), whose sum is σ = 39431494200. Its totient is φ = 10515065112.

The previous prime is 21030130223. The next prime is 21030130237. The reversal of 21030130232 is 23203103012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21030130232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030130237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314383132 + ... + 1314383147.

It is an arithmetic number, because the mean of its divisors is an integer number (4928936775).

Almost surely, 2^21030130232 is an apocalyptic number.

It is an amenable number.

21030130232 is a deficient number, since it is larger than the sum of its proper divisors (18401363968).

21030130232 is a wasteful number, since it uses less digits than its factorization.

21030130232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628766285 (or 2628766281 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21030130232 its reverse (23203103012), we get a palindrome (44233233244).

The spelling of 21030130232 in words is "twenty-one billion, thirty million, one hundred thirty thousand, two hundred thirty-two".