21342033242 has 16 divisors (see below), whose sum is σ = 32299833672. Its totient is φ = 10575812160.

The previous prime is 21342033221. The next prime is 21342033253. The reversal of 21342033242 is 24233024312.

It can be written as a sum of positive squares in 4 ways, for example, as 21275431321 + 66601921 = 145861^2 + 8161^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12392 + ... + 206972.

Almost surely, 2^21342033242 is an apocalyptic number.

21342033242 is a deficient number, since it is larger than the sum of its proper divisors (10957800430).

21342033242 is a wasteful number, since it uses less digits than its factorization.

21342033242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195073.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21342033242 its reverse (24233024312), we get a palindrome (45575057554).

The spelling of 21342033242 in words is "twenty-one billion, three hundred forty-two million, thirty-three thousand, two hundred forty-two".