21243441402032 has 20 divisors (see below), whose sum is σ = 41856780730440. Its totient is φ = 10441691536128.

The previous prime is 21243441401977. The next prime is 21243441402041. The reversal of 21243441402032 is 23020414434212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21243441402032.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11251821833 + ... + 11251823720.

It is an arithmetic number, because the mean of its divisors is an integer number (2092839036522).

Almost surely, 2^{21243441402032} is an apocalyptic number.

It is an amenable number.

21243441402032 is a deficient number, since it is larger than the sum of its proper divisors (20613339328408).

21243441402032 is a wasteful number, since it uses less digits than its factorization.

21243441402032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22503645620 (or 22503645614 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21243441402032 its reverse (23020414434212), we get a palindrome (44263855836244).

The spelling of 21243441402032 in words is "twenty-one trillion, two hundred forty-three billion, four hundred forty-one million, four hundred two thousand, thirty-two".