21133310434 has 16 divisors (see below), whose sum is σ = 32148990720. Its totient is φ = 10417512880.

The previous prime is 21133310383. The next prime is 21133310459. The reversal of 21133310434 is 43401333112.

It is a junction number, because it is equal to n+sod(n) for n = 21133310399 and 21133310408.

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 7 ways as a sum of consecutive naturals, for example, 53377 + ... + 212404.

It is an arithmetic number, because the mean of its divisors is an integer number (2009311920).

Almost surely, 2^21133310434 is an apocalyptic number.

21133310434 is a deficient number, since it is larger than the sum of its proper divisors (11015680286).

21133310434 is a wasteful number, since it uses less digits than its factorization.

21133310434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266345.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21133310434 its reverse (43401333112), we get a palindrome (64534643546).

The spelling of 21133310434 in words is "twenty-one billion, one hundred thirty-three million, three hundred ten thousand, four hundred thirty-four".