21331364010 has 32 divisors (see below), whose sum is σ = 55849390272. Its totient is φ = 5171239680.

The previous prime is 21331364009. The next prime is 21331364017. The reversal of 21331364010 is 1046313312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21331364017) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32319919 + ... + 32320578.

It is an arithmetic number, because the mean of its divisors is an integer number (1745293446).

Almost surely, 2^21331364010 is an apocalyptic number.

21331364010 is an abundant number, since it is smaller than the sum of its proper divisors (34518026262).

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

21331364010 is a wasteful number, since it uses less digits than its factorization.

21331364010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64640518.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21331364010 its reverse (1046313312), we get a palindrome (22377677322).

The spelling of 21331364010 in words is "twenty-one billion, three hundred thirty-one million, three hundred sixty-four thousand, ten".