21445221535134 has 16 divisors (see below), whose sum is σ = 42910974662160. Its totient is φ = 7144985246400.

The previous prime is 21445221535123. The next prime is 21445221535163. The reversal of 21445221535134 is 43153512254412.

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, 855469417 + ... + 855494484.

It is an arithmetic number, because the mean of its divisors is an integer number (2681935916385).

Almost surely, 2^{21445221535134} is an apocalyptic number.

21445221535134 is an abundant number, since it is smaller than the sum of its proper divisors (21465753127026).

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

21445221535134 is a wasteful number, since it uses less digits than its factorization.

21445221535134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710965995.

The product of its digits is 576000, while the sum is 42.

Adding to 21445221535134 its reverse (43153512254412), we get a palindrome (64598733789546).

The spelling of 21445221535134 in words is "twenty-one trillion, four hundred forty-five billion, two hundred twenty-one million, five hundred thirty-five thousand, one hundred thirty-four".