21032320012 has 48 divisors (see below), whose sum is σ = 40455491328. Its totient is φ = 9488214720.

The previous prime is 21032320007. The next prime is 21032320019. The reversal of 21032320012 is 21002323012.

It is not an unprimeable number, because it can be changed into a prime (21032320019) 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, 5781058 + ... + 5784694.

It is an arithmetic number, because the mean of its divisors is an integer number (842822736).

Almost surely, 2^21032320012 is an apocalyptic number.

21032320012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21032320012 is a deficient number, since it is larger than the sum of its proper divisors (19423171316).

21032320012 is a wasteful number, since it uses less digits than its factorization.

21032320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606 (or 4604 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21032320012 its reverse (21002323012), we get a palindrome (42034643024).

The spelling of 21032320012 in words is "twenty-one billion, thirty-two million, three hundred twenty thousand, twelve".