21433421432 has 24 divisors (see below), whose sum is σ = 42690707760. Its totient is φ = 10086314880.

The previous prime is 21433421431. The next prime is 21433421461. The reversal of 21433421432 is 23412433412.

It is a junction number, because it is equal to n+sod(n) for n = 21433421395 and 21433421404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433421431) 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 5 ways as a sum of consecutive naturals, for example, 4632944 + ... + 4637567.

It is an arithmetic number, because the mean of its divisors is an integer number (1778779490).

Almost surely, 2^21433421432 is an apocalyptic number.

It is an amenable number.

21433421432 is a deficient number, since it is larger than the sum of its proper divisors (21257286328).

21433421432 is a wasteful number, since it uses less digits than its factorization.

21433421432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9270551 (or 9270530 counting only the distinct ones).

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

Adding to 21433421432 its reverse (23412433412), we get a palindrome (44845854844).

The spelling of 21433421432 in words is "twenty-one billion, four hundred thirty-three million, four hundred twenty-one thousand, four hundred thirty-two".