21144150132 has 144 divisors (see below), whose sum is σ = 58765613760. Its totient is φ = 5898009600.

The previous prime is 21144150127. The next prime is 21144150173. The reversal of 21144150132 is 23105144112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4983532 + ... + 4987772.

It is an arithmetic number, because the mean of its divisors is an integer number (408094540).

Almost surely, 2^21144150132 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 21144150132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29382806880).

21144150132 is an abundant number, since it is smaller than the sum of its proper divisors (37621463628).

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

21144150132 is a wasteful number, since it uses less digits than its factorization.

21144150132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462 (or 4453 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21144150132 its reverse (23105144112), we get a palindrome (44249294244).

The spelling of 21144150132 in words is "twenty-one billion, one hundred forty-four million, one hundred fifty thousand, one hundred thirty-two".