30990000000 has 256 divisors, whose sum is σ = 102995830080. Its totient is φ = 8256000000.

The previous prime is 30989999959. The next prime is 30990000031. The reversal of 30990000000 is 9903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29999484 + ... + 30000516.

Almost surely, 2^30990000000 is an apocalyptic number.

30990000000 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 30990000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51497915040).

30990000000 is an abundant number, since it is smaller than the sum of its proper divisors (72005830080).

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

30990000000 is an frugal number, since it uses more digits than its factorization.

30990000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 21.

Adding to 30990000000 its reverse (9903), we get a palindrome (30990009903).

The spelling of 30990000000 in words is "thirty billion, nine hundred ninety million", and thus it is an aban number.