21441214432 has 48 divisors (see below), whose sum is σ = 46359054000. Its totient is φ = 9680573440.

The previous prime is 21441214393. The next prime is 21441214433. The reversal of 21441214432 is 23441214412.

It is a self number, because there is not a number n which added to its sum of digits gives 21441214432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441214433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151957 + ... + 256852.

It is an arithmetic number, because the mean of its divisors is an integer number (965813625).

Almost surely, 2^21441214432 is an apocalyptic number.

21441214432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21441214432 is an abundant number, since it is smaller than the sum of its proper divisors (24917839568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21441214432 is a wasteful number, since it uses less digits than its factorization.

21441214432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408979 (or 408971 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

Adding to 21441214432 its reverse (23441214412), we get a palindrome (44882428844).

The spelling of 21441214432 in words is "twenty-one billion, four hundred forty-one million, two hundred fourteen thousand, four hundred thirty-two".