21234020335 has 16 divisors (see below), whose sum is σ = 28475248032. Its totient is φ = 15066265600.

The previous prime is 21234020333. The next prime is 21234020347. The reversal of 21234020335 is 53302043212.

It is not a de Polignac number, because 21234020335 - 2¹ = 21234020333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234020333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4705954 + ... + 4710463.

It is an arithmetic number, because the mean of its divisors is an integer number (1779703002).

Almost surely, 2^21234020335 is an apocalyptic number.

21234020335 is a deficient number, since it is larger than the sum of its proper divisors (7241227697).

21234020335 is a wasteful number, since it uses less digits than its factorization.

21234020335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416474.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21234020335 its reverse (53302043212), we get a palindrome (74536063547).

The spelling of 21234020335 in words is "twenty-one billion, two hundred thirty-four million, twenty thousand, three hundred thirty-five".