21044145150 has 216 divisors, whose sum is σ = 66454184160. Its totient is φ = 4760017920.

The previous prime is 21044145131. The next prime is 21044145217. The reversal of 21044145150 is 5154144012.

21044145150 is a `hidden beast` number, since 2 + 104 + 41 + 4 + 515 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2133931 + ... + 2143769.

It is an arithmetic number, because the mean of its divisors is an integer number (307658260).

Almost surely, 2^21044145150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21044145150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33227092080).

21044145150 is an abundant number, since it is smaller than the sum of its proper divisors (45410039010).

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

21044145150 is a wasteful number, since it uses less digits than its factorization.

21044145150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9968 (or 9953 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 21044145150 its reverse (5154144012), we get a palindrome (26198289162).

The spelling of 21044145150 in words is "twenty-one billion, forty-four million, one hundred forty-five thousand, one hundred fifty".