21234433242 has 16 divisors (see below), whose sum is σ = 46329672672. Its totient is φ = 6434676720.

The previous prime is 21234433217. The next prime is 21234433277. The reversal of 21234433242 is 24233443212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160866853 + ... + 160866984.

It is an arithmetic number, because the mean of its divisors is an integer number (2895604542).

Almost surely, 2^21234433242 is an apocalyptic number.

21234433242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21234433242 is an abundant number, since it is smaller than the sum of its proper divisors (25095239430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234433242 is a wasteful number, since it uses less digits than its factorization.

21234433242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321733853.

The product of its digits is 27648, while the sum is 30.

Adding to 21234433242 its reverse (24233443212), we get a palindrome (45467876454).

The spelling of 21234433242 in words is "twenty-one billion, two hundred thirty-four million, four hundred thirty-three thousand, two hundred forty-two".