30520173000 has 128 divisors (see below), whose sum is σ = 95292961920. Its totient is φ = 8132729600.

The previous prime is 30520172999. The next prime is 30520173007. The reversal of 30520173000 is 37102503.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30520173007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5358154 + ... + 5363846.

It is an arithmetic number, because the mean of its divisors is an integer number (744476265).

Almost surely, 2^30520173000 is an apocalyptic number.

30520173000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30520173000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47646480960).

30520173000 is an abundant number, since it is smaller than the sum of its proper divisors (64772788920).

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

30520173000 is a wasteful number, since it uses less digits than its factorization.

30520173000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504 (or 7490 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

Adding to 30520173000 its reverse (37102503), we get a palindrome (30557275503).

The spelling of 30520173000 in words is "thirty billion, five hundred twenty million, one hundred seventy-three thousand".