21150544332 has 96 divisors (see below), whose sum is σ = 53418613248. Its totient is φ = 6496326144.

The previous prime is 21150544297. The next prime is 21150544333. The reversal of 21150544332 is 23344505112.

It is a self number, because there is not a number n which added to its sum of digits gives 21150544332.

It is not an unprimeable number, because it can be changed into a prime (21150544333) by changing a digit.

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, 854158 + ... + 878570.

It is an arithmetic number, because the mean of its divisors is an integer number (556443888).

Almost surely, 2^21150544332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21150544332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26709306624).

21150544332 is an abundant number, since it is smaller than the sum of its proper divisors (32268068916).

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

21150544332 is a wasteful number, since it uses less digits than its factorization.

21150544332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24559 (or 24557 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 21150544332 in words is "twenty-one billion, one hundred fifty million, five hundred forty-four thousand, three hundred thirty-two".