30520507812 has 24 divisors (see below), whose sum is σ = 71233204896. Its totient is φ = 10170833088.

The previous prime is 30520507811. The next prime is 30520507859. The reversal of 30520507812 is 21870502503.

It is not an unprimeable number, because it can be changed into a prime (30520507811) 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, 285778 + ... + 377769.

It is an arithmetic number, because the mean of its divisors is an integer number (2968050204).

Almost surely, 2^30520507812 is an apocalyptic number.

It is an amenable number.

30520507812 is an abundant number, since it is smaller than the sum of its proper divisors (40712697084).

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

30520507812 is a wasteful number, since it uses less digits than its factorization.

30520507812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667387 (or 667385 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 30520507812 in words is "thirty billion, five hundred twenty million, five hundred seven thousand, eight hundred twelve".