12001533500 has 48 divisors (see below), whose sum is σ = 28594212192. Its totient is φ = 4364192000.

The previous prime is 12001533497. The next prime is 12001533517. The reversal of 12001533500 is 533510021.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 15 ways as a sum of consecutive naturals, for example, 1085549 + ... + 1096548.

It is an arithmetic number, because the mean of its divisors is an integer number (595712754).

Almost surely, 2^12001533500 is an apocalyptic number.

12001533500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001533500 is an abundant number, since it is smaller than the sum of its proper divisors (16592678692).

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

12001533500 is a wasteful number, since it uses less digits than its factorization.

12001533500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182127 (or 2182115 counting only the distinct ones).

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

The spelling of 12001533500 in words is "twelve billion, one million, five hundred thirty-three thousand, five hundred".