21144041433 has 24 divisors (see below), whose sum is σ = 31613017800. Its totient is φ = 13602000384.

The previous prime is 21144041417. The next prime is 21144041441. The reversal of 21144041433 is 33414044112.

21144041433 is a `hidden beast` number, since 2 + 114 + 404 + 143 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1394798409 + 19749243024 = 37347^2 + 140532^2 .

It is not a de Polignac number, because 21144041433 - 2⁴ = 21144041417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21144041397 and 21144041406.

It is not an unprimeable number, because it can be changed into a prime (21144041033) 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 23 ways as a sum of consecutive naturals, for example, 441003 + ... + 486591.

It is an arithmetic number, because the mean of its divisors is an integer number (1317209075).

Almost surely, 2^21144041433 is an apocalyptic number.

It is an amenable number.

21144041433 is a deficient number, since it is larger than the sum of its proper divisors (10468976367).

21144041433 is a wasteful number, since it uses less digits than its factorization.

21144041433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47401 (or 47398 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21144041433 its reverse (33414044112), we get a palindrome (54558085545).

The spelling of 21144041433 in words is "twenty-one billion, one hundred forty-four million, forty-one thousand, four hundred thirty-three".