30533351988 has 12 divisors (see below), whose sum is σ = 71244488000. Its totient is φ = 10177783992.

The previous prime is 30533351987. The next prime is 30533352001. The reversal of 30533351988 is 88915333503.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30533351983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272222988 + ... + 1272223011.

Almost surely, 2^30533351988 is an apocalyptic number.

It is an amenable number.

30533351988 is an abundant number, since it is smaller than the sum of its proper divisors (40711136012).

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

30533351988 is a wasteful number, since it uses less digits than its factorization.

30533351988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544446006 (or 2544446004 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 30533351988 in words is "thirty billion, five hundred thirty-three million, three hundred fifty-one thousand, nine hundred eighty-eight".