21430143432 has 40 divisors (see below), whose sum is σ = 60024246150. Its totient is φ = 7143380928.

The previous prime is 21430143379. The next prime is 21430143433. The reversal of 21430143432 is 23434103412.

21430143432 is a `hidden beast` number, since 2 + 14 + 301 + 4 + 343 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16856867556 + 4573275876 = 129834^2 + 67626^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21430143396 and 21430143405.

It is not an unprimeable number, because it can be changed into a prime (21430143433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16534957 + ... + 16536252.

Almost surely, 2^21430143432 is an apocalyptic number.

It is an amenable number.

21430143432 is an abundant number, since it is smaller than the sum of its proper divisors (38594102718).

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

21430143432 is a wasteful number, since it uses less digits than its factorization.

21430143432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33071227 (or 33071214 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21430143432 its reverse (23434103412), we get a palindrome (44864246844).

The spelling of 21430143432 in words is "twenty-one billion, four hundred thirty million, one hundred forty-three thousand, four hundred thirty-two".