21442201432 has 16 divisors (see below), whose sum is σ = 40208218200. Its totient is φ = 10720009920.

The previous prime is 21442201373. The next prime is 21442201447. The reversal of 21442201432 is 23410224412.

It is a junction number, because it is equal to n+sod(n) for n = 21442201397 and 21442201406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49557 + ... + 212932.

Almost surely, 2^21442201432 is an apocalyptic number.

It is an amenable number.

21442201432 is a deficient number, since it is larger than the sum of its proper divisors (18766016768).

21442201432 is a wasteful number, since it uses less digits than its factorization.

21442201432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272706 (or 272702 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21442201432 its reverse (23410224412), we get a palindrome (44852425844).

The spelling of 21442201432 in words is "twenty-one billion, four hundred forty-two million, two hundred one thousand, four hundred thirty-two".