21543033034512 has 60 divisors (see below), whose sum is σ = 65771532678384. Its totient is φ = 6528191828160.

The previous prime is 21543033034511. The next prime is 21543033034517.

21543033034512 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 303 + 3 + 0 + 345 + 1 + 2 = 666.

21543033034512 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21543033034511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6800198238 + ... + 6800201405.

Almost surely, 2^{21543033034512} is an apocalyptic number.

21543033034512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21543033034512 is an abundant number, since it is smaller than the sum of its proper divisors (44228499643872).

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

21543033034512 is a wasteful number, since it uses less digits than its factorization.

21543033034512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13600399668 (or 13600399659 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

It can be divided in two parts, 2154303 and 3034512, that added together give a palindrome (5188815).

The spelling of 21543033034512 in words is "twenty-one trillion, five hundred forty-three billion, thirty-three million, thirty-four thousand, five hundred twelve".