21440202232 has 8 divisors (see below), whose sum is σ = 40200379200. Its totient is φ = 10720101112.

The previous prime is 21440202197. The next prime is 21440202253. The reversal of 21440202232 is 23220204412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340012632 + ... + 1340012647.

It is an arithmetic number, because the mean of its divisors is an integer number (5025047400).

Almost surely, 2^21440202232 is an apocalyptic number.

It is an amenable number.

21440202232 is a deficient number, since it is larger than the sum of its proper divisors (18760176968).

21440202232 is a wasteful number, since it uses less digits than its factorization.

21440202232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680025285 (or 2680025281 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21440202232 its reverse (23220204412), we get a palindrome (44660406644).

The spelling of 21440202232 in words is "twenty-one billion, four hundred forty million, two hundred two thousand, two hundred thirty-two".