21431023230224 has 80 divisors (see below), whose sum is σ = 43123714166064. Its totient is φ = 10309590835200.

The previous prime is 21431023230223. The next prime is 21431023230229. The reversal of 21431023230224 is 42203232013412.

It can be written as a sum of positive squares in 8 ways, for example, as 447587760400 + 20983435469824 = 669020^2 + 4580768^2 .

It is not an unprimeable number, because it can be changed into a prime (21431023230223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428141582 + ... + 428191634.

Almost surely, 2^{21431023230224} is an apocalyptic number.

It is an amenable number.

21431023230224 is an abundant number, since it is smaller than the sum of its proper divisors (21692690935840).

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

21431023230224 is a wasteful number, since it uses less digits than its factorization.

21431023230224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59116 (or 59110 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21431023230224 its reverse (42203232013412), we get a palindrome (63634255243636).

The spelling of 21431023230224 in words is "twenty-one trillion, four hundred thirty-one billion, twenty-three million, two hundred thirty thousand, two hundred twenty-four".