21033410242 has 32 divisors (see below), whose sum is σ = 36042605424. Its totient is φ = 9119692800.

The previous prime is 21033410213. The next prime is 21033410243. The reversal of 21033410242 is 24201433012.

It can be written as a sum of positive squares in 8 ways, for example, as 2322179721 + 18711230521 = 48189^2 + 136789^2 .

It is not an unprimeable number, because it can be changed into a prime (21033410243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 195142 + ... + 283102.

Almost surely, 2^21033410242 is an apocalyptic number.

21033410242 is a deficient number, since it is larger than the sum of its proper divisors (15009195182).

21033410242 is a wasteful number, since it uses less digits than its factorization.

21033410242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88534.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21033410242 its reverse (24201433012), we get a palindrome (45234843254).

The spelling of 21033410242 in words is "twenty-one billion, thirty-three million, four hundred ten thousand, two hundred forty-two".