21442544220032 has 64 divisors (see below), whose sum is σ = 46031920892160. Its totient is φ = 9890452408320.

The previous prime is 21442544219977. The next prime is 21442544220043. The reversal of 21442544220032 is 23002244524412.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 21442544219974 and 21442544220001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277408 + ... + 6672095.

It is an arithmetic number, because the mean of its divisors is an integer number (719248763940).

Almost surely, 2^{21442544220032} is an apocalyptic number.

It is an amenable number.

21442544220032 is an abundant number, since it is smaller than the sum of its proper divisors (24589376672128).

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

21442544220032 is a wasteful number, since it uses less digits than its factorization.

21442544220032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7951151 (or 7951139 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 21442544220032 its reverse (23002244524412), we get a palindrome (44444788744444).

The spelling of 21442544220032 in words is "twenty-one trillion, four hundred forty-two billion, five hundred forty-four million, two hundred twenty thousand, thirty-two".