21000030002032 has 20 divisors (see below), whose sum is σ = 40703261628096. Its totient is φ = 10495962485120.

The previous prime is 21000030002027. The next prime is 21000030002033. The reversal of 21000030002032 is 23020003000012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000030002033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253239493 + ... + 253322404.

Almost surely, 2^{21000030002032} is an apocalyptic number.

It is an amenable number.

21000030002032 is a deficient number, since it is larger than the sum of its proper divisors (19703231626064).

21000030002032 is a wasteful number, since it uses less digits than its factorization.

21000030002032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506564496 (or 506564490 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21000030002032 its reverse (23020003000012), we get a palindrome (44020033002044).

The spelling of 21000030002032 in words is "twenty-one trillion, thirty million, two thousand, thirty-two".