30420130520 has 32 divisors (see below), whose sum is σ = 73710317520. Its totient is φ = 11232048000.

The previous prime is 30420130459. The next prime is 30420130529. The reversal of 30420130520 is 2503102403.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30420130492 and 30420130501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420130529) 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, 29249606 + ... + 29250645.

Almost surely, 2^30420130520 is an apocalyptic number.

It is an amenable number.

30420130520 is an abundant number, since it is smaller than the sum of its proper divisors (43290187000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30420130520 is a wasteful number, since it uses less digits than its factorization.

30420130520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58500275 (or 58500271 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 30420130520 its reverse (2503102403), we get a palindrome (32923232923).

The spelling of 30420130520 in words is "thirty billion, four hundred twenty million, one hundred thirty thousand, five hundred twenty".