21043434034 has 8 divisors (see below), whose sum is σ = 36074458368. Its totient is φ = 9018614580.

The previous prime is 21043434023. The next prime is 21043434047. The reversal of 21043434034 is 43043434012.

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

It is a super-2 number, since 2×21043434034² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21043433993 and 21043434011.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751551202 + ... + 751551229.

It is an arithmetic number, because the mean of its divisors is an integer number (4509307296).

Almost surely, 2^21043434034 is an apocalyptic number.

21043434034 is a deficient number, since it is larger than the sum of its proper divisors (15031024334).

21043434034 is a wasteful number, since it uses less digits than its factorization.

21043434034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503102440.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21043434034 its reverse (43043434012), we get a palindrome (64086868046).

The spelling of 21043434034 in words is "twenty-one billion, forty-three million, four hundred thirty-four thousand, thirty-four".