21432302343 has 24 divisors (see below), whose sum is σ = 31271354400. Its totient is φ = 14143719744.

The previous prime is 21432302341. The next prime is 21432302357. The reversal of 21432302343 is 34320323412.

21432302343 is a `hidden beast` number, since 2 + 14 + 3 + 2 + 302 + 343 = 666.

It is not a de Polignac number, because 21432302343 - 2¹ = 21432302341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432302341) 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 23 ways as a sum of consecutive naturals, for example, 1085998 + ... + 1105556.

It is an arithmetic number, because the mean of its divisors is an integer number (1302973100).

Almost surely, 2^21432302343 is an apocalyptic number.

21432302343 is a deficient number, since it is larger than the sum of its proper divisors (9839052057).

21432302343 is a wasteful number, since it uses less digits than its factorization.

21432302343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20791 (or 20788 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21432302343 its reverse (34320323412), we get a palindrome (55752625755).

The spelling of 21432302343 in words is "twenty-one billion, four hundred thirty-two million, three hundred two thousand, three hundred forty-three".