21303232434 has 48 divisors (see below), whose sum is σ = 50449617504. Its totient is φ = 6443150400.

The previous prime is 21303232411. The next prime is 21303232471. The reversal of 21303232434 is 43423230312.

21303232434 is a `hidden beast` number, since 2 + 1 + 303 + 2 + 324 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21303232398 and 21303232407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 694 + ... + 206414.

It is an arithmetic number, because the mean of its divisors is an integer number (1051033698).

Almost surely, 2^21303232434 is an apocalyptic number.

21303232434 is an abundant number, since it is smaller than the sum of its proper divisors (29146385070).

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

21303232434 is a wasteful number, since it uses less digits than its factorization.

21303232434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206263 (or 206260 counting only the distinct ones).

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

Adding to 21303232434 its reverse (43423230312), we get a palindrome (64726462746).

The spelling of 21303232434 in words is "twenty-one billion, three hundred three million, two hundred thirty-two thousand, four hundred thirty-four".