21134423234 has 8 divisors (see below), whose sum is σ = 31710726288. Its totient is φ = 10564181140.

The previous prime is 21134423221. The next prime is 21134423249. The reversal of 21134423234 is 43232443112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21134423197 and 21134423206.

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 3 ways as a sum of consecutive naturals, for example, 1506512 + ... + 1520475.

It is an arithmetic number, because the mean of its divisors is an integer number (3963840786).

Almost surely, 2^21134423234 is an apocalyptic number.

21134423234 is a deficient number, since it is larger than the sum of its proper divisors (10576303054).

21134423234 is a wasteful number, since it uses less digits than its factorization.

21134423234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030480.

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

Adding to 21134423234 its reverse (43232443112), we get a palindrome (64366866346).

The spelling of 21134423234 in words is "twenty-one billion, one hundred thirty-four million, four hundred twenty-three thousand, two hundred thirty-four".