21140242432324 has 12 divisors (see below), whose sum is σ = 36997508747500. Its totient is φ = 10569525647328.

The previous prime is 21140242432297. The next prime is 21140242432471. The reversal of 21140242432324 is 42323424204112.

It can be written as a sum of positive squares in 2 ways, for example, as 1695829017600 + 19444413414724 = 1302240^2 + 4409582^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21140242432324.

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, 148812339 + ... + 148954330.

Almost surely, 2^{21140242432324} is an apocalyptic number.

It is an amenable number.

21140242432324 is a deficient number, since it is larger than the sum of its proper divisors (15857266315176).

21140242432324 is a wasteful number, since it uses less digits than its factorization.

21140242432324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297784422 (or 297784420 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 21140242432324 its reverse (42323424204112), we get a palindrome (63463666636436).

The spelling of 21140242432324 in words is "twenty-one trillion, one hundred forty billion, two hundred forty-two million, four hundred thirty-two thousand, three hundred twenty-four".