21034313234 has 48 divisors (see below), whose sum is σ = 37198249920. Its totient is φ = 8829817920.

The previous prime is 21034313233. The next prime is 21034313239. The reversal of 21034313234 is 43231343012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21034313233) 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 23 ways as a sum of consecutive naturals, for example, 400832 + ... + 450260.

It is an arithmetic number, because the mean of its divisors is an integer number (774963540).

Almost surely, 2^21034313234 is an apocalyptic number.

21034313234 is a deficient number, since it is larger than the sum of its proper divisors (16163936686).

21034313234 is a wasteful number, since it uses less digits than its factorization.

21034313234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49523 (or 49494 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21034313234 its reverse (43231343012), we get a palindrome (64265656246).

The spelling of 21034313234 in words is "twenty-one billion, thirty-four million, three hundred thirteen thousand, two hundred thirty-four".