21440422132 has 12 divisors (see below), whose sum is σ = 37521897280. Its totient is φ = 10719880056.

The previous prime is 21440422123. The next prime is 21440422169. The reversal of 21440422132 is 23122404412.

It is a junction number, because it is equal to n+sod(n) for n = 21440422097 and 21440422106.

It is a congruent number.

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, 116053 + ... + 237379.

Almost surely, 2^21440422132 is an apocalyptic number.

It is an amenable number.

21440422132 is a deficient number, since it is larger than the sum of its proper divisors (16081475148).

21440422132 is a wasteful number, since it uses less digits than its factorization.

21440422132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165510 (or 165508 counting only the distinct ones).

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

Adding to 21440422132 its reverse (23122404412), we get a palindrome (44562826544).

The spelling of 21440422132 in words is "twenty-one billion, four hundred forty million, four hundred twenty-two thousand, one hundred thirty-two".