21002310032 has 40 divisors (see below), whose sum is σ = 45823233792. Its totient is φ = 9238550400.

The previous prime is 21002310031. The next prime is 21002310059. The reversal of 21002310032 is 23001320012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21002309989 and 21002310016.

It is not an unprimeable number, because it can be changed into a prime (21002310031) 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 7 ways as a sum of consecutive naturals, for example, 1919243 + ... + 1930154.

Almost surely, 2^21002310032 is an apocalyptic number.

21002310032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21002310032 is an abundant number, since it is smaller than the sum of its proper divisors (24820923760).

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

21002310032 is a wasteful number, since it uses less digits than its factorization.

21002310032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849447 (or 3849441 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21002310032 its reverse (23001320012), we get a palindrome (44003630044).

It can be divided in two parts, 2100 and 2310032, that added together give a palindrome (2312132).

The spelling of 21002310032 in words is "twenty-one billion, two million, three hundred ten thousand, thirty-two".