21144041032 has 16 divisors (see below), whose sum is σ = 39660265260. Its totient is φ = 10567970304.

The previous prime is 21144041029. The next prime is 21144041033. The reversal of 21144041032 is 23014044112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19798178436 + 1345862596 = 140706^2 + 36686^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21144040994 and 21144041012.

It is not an unprimeable number, because it can be changed into a prime (21144041033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484033 + ... + 525904.

Almost surely, 2^21144041032 is an apocalyptic number.

It is an amenable number.

21144041032 is a deficient number, since it is larger than the sum of its proper divisors (18516224228).

21144041032 is a wasteful number, since it uses less digits than its factorization.

21144041032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012560 (or 1012556 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21144041032 its reverse (23014044112), we get a palindrome (44158085144).

The spelling of 21144041032 in words is "twenty-one billion, one hundred forty-four million, forty-one thousand, thirty-two".