21530322303512 has 64 divisors (see below), whose sum is σ = 44080231708800. Its totient is φ = 9777415680000.

The previous prime is 21530322303509. The next prime is 21530322303527.

21530322303512 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1090740539 + ... + 1090760277.

It is an arithmetic number, because the mean of its divisors is an integer number (688753620450).

Almost surely, 2^{21530322303512} is an apocalyptic number.

21530322303512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21530322303512 is an abundant number, since it is smaller than the sum of its proper divisors (22549909405288).

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

21530322303512 is a wasteful number, since it uses less digits than its factorization.

21530322303512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30648 (or 30644 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 32.

It can be divided in two parts, 2153032 and 2303512, that added together give a palindrome (4456544).

The spelling of 21530322303512 in words is "twenty-one trillion, five hundred thirty billion, three hundred twenty-two million, three hundred three thousand, five hundred twelve".