21333232010 has 16 divisors (see below), whose sum is σ = 39723949800. Its totient is φ = 8239041216.

The previous prime is 21333232007. The next prime is 21333232027. The reversal of 21333232010 is 1023233312.

It can be written as a sum of positive squares in 4 ways, for example, as 21039212401 + 294019609 = 145049^2 + 17147^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36781145 + ... + 36781724.

Almost surely, 2^21333232010 is an apocalyptic number.

21333232010 is a deficient number, since it is larger than the sum of its proper divisors (18390717790).

21333232010 is a wasteful number, since it uses less digits than its factorization.

21333232010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73562905.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21333232010 its reverse (1023233312), we get a palindrome (22356465322).

The spelling of 21333232010 in words is "twenty-one billion, three hundred thirty-three million, two hundred thirty-two thousand, ten".