30513105020 has 48 divisors (see below), whose sum is σ = 67779512640. Its totient is φ = 11514640896.

The previous prime is 30513105013. The next prime is 30513105031. The reversal of 30513105020 is 2050131503.

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 = 30513104983 and 30513105001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420755 + ... + 487914.

It is an arithmetic number, because the mean of its divisors is an integer number (1412073180).

Almost surely, 2^30513105020 is an apocalyptic number.

It is an amenable number.

30513105020 is an abundant number, since it is smaller than the sum of its proper divisors (37266407620).

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

30513105020 is a wasteful number, since it uses less digits than its factorization.

30513105020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908774 (or 908772 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

Adding to 30513105020 its reverse (2050131503), we get a palindrome (32563236523).

The spelling of 30513105020 in words is "thirty billion, five hundred thirteen million, one hundred five thousand, twenty".