21134320423144 has 16 divisors (see below), whose sum is σ = 39626907606720. Its totient is φ = 10567145061360.

The previous prime is 21134320423109. The next prime is 21134320423163. The reversal of 21134320423144 is 44132402343112.

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, 5942127 + ... + 8807809.

It is an arithmetic number, because the mean of its divisors is an integer number (2476681725420).

Almost surely, 2^{21134320423144} is an apocalyptic number.

It is an amenable number.

21134320423144 is a deficient number, since it is larger than the sum of its proper divisors (18492587183576).

21134320423144 is a wasteful number, since it uses less digits than its factorization.

21134320423144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787560 (or 3787556 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 21134320423144 its reverse (44132402343112), we get a palindrome (65266722766256).

The spelling of 21134320423144 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred twenty million, four hundred twenty-three thousand, one hundred forty-four".