21100030032 has 20 divisors (see below), whose sum is σ = 54508411040. Its totient is φ = 7033343328.

The previous prime is 21100030019. The next prime is 21100030033. The reversal of 21100030032 is 23003000112.

It is a happy number.

It is a super-3 number, since 3×21100030032³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100030033) 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, 219791932 + ... + 219792027.

It is an arithmetic number, because the mean of its divisors is an integer number (2725420552).

Almost surely, 2^21100030032 is an apocalyptic number.

It is an amenable number.

21100030032 is an abundant number, since it is smaller than the sum of its proper divisors (33408381008).

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

21100030032 is a wasteful number, since it uses less digits than its factorization.

21100030032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439583970 (or 439583964 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21100030032 its reverse (23003000112), we get a palindrome (44103030144).

The spelling of 21100030032 in words is "twenty-one billion, one hundred million, thirty thousand, thirty-two".