21442513023530 has 8 divisors (see below), whose sum is σ = 38596523442372. Its totient is φ = 8577005209408.

The previous prime is 21442513023527. The next prime is 21442513023587. The reversal of 21442513023530 is 3532031524412.

It can be written as a sum of positive squares in 2 ways, for example, as 21183494117809 + 259018905721 = 4602553^2 + 508939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1072125651167 + ... + 1072125651186.

Almost surely, 2^{21442513023530} is an apocalyptic number.

21442513023530 is a deficient number, since it is larger than the sum of its proper divisors (17154010418842).

21442513023530 is a wasteful number, since it uses less digits than its factorization.

21442513023530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144251302360.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21442513023530 its reverse (3532031524412), we get a palindrome (24974544547942).

The spelling of 21442513023530 in words is "twenty-one trillion, four hundred forty-two billion, five hundred thirteen million, twenty-three thousand, five hundred thirty".