21442511130452 has 12 divisors (see below), whose sum is σ = 37524779935776. Its totient is φ = 10721145434520.

The previous prime is 21442511130451. The next prime is 21442511130479. The reversal of 21442511130452 is 25403111524412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442511130451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27093824 + ... + 27874007.

It is an arithmetic number, because the mean of its divisors is an integer number (3127064994648).

Almost surely, 2^{21442511130452} is an apocalyptic number.

It is an amenable number.

21442511130452 is a deficient number, since it is larger than the sum of its proper divisors (16082268805324).

21442511130452 is a wasteful number, since it uses less digits than its factorization.

21442511130452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55065358 (or 55065356 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 21442511130452 its reverse (25403111524412), we get a palindrome (46845622654864).

The spelling of 21442511130452 in words is "twenty-one trillion, four hundred forty-two billion, five hundred eleven million, one hundred thirty thousand, four hundred fifty-two".