21431441043 has 6 divisors (see below), whose sum is σ = 30956525964. Its totient is φ = 14287627356.

The previous prime is 21431441041. The next prime is 21431441081. The reversal of 21431441043 is 34014413412.

21431441043 is a `hidden beast` number, since 214 + 3 + 1 + 441 + 0 + 4 + 3 = 666.

It is not a de Polignac number, because 21431441043 - 2¹ = 21431441041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21431440998 and 21431441016.

It is not an unprimeable number, because it can be changed into a prime (21431441041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1190635605 + ... + 1190635622.

It is an arithmetic number, because the mean of its divisors is an integer number (5159420994).

Almost surely, 2^21431441043 is an apocalyptic number.

21431441043 is a deficient number, since it is larger than the sum of its proper divisors (9525084921).

21431441043 is a wasteful number, since it uses less digits than its factorization.

21431441043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381271233 (or 2381271230 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21431441043 its reverse (34014413412), we get a palindrome (55445854455).

The spelling of 21431441043 in words is "twenty-one billion, four hundred thirty-one million, four hundred forty-one thousand, forty-three".