21100032030 has 96 divisors (see below), whose sum is σ = 63614057472. Its totient is φ = 4384416960.

The previous prime is 21100032029. The next prime is 21100032043. The reversal of 21100032030 is 3023000112.

It is a happy number.

It is a super-2 number, since 2×21100032030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100031997 and 21100032015.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 389782 + ... + 440601.

It is an arithmetic number, because the mean of its divisors is an integer number (662646432).

Almost surely, 2^21100032030 is an apocalyptic number.

21100032030 is an abundant number, since it is smaller than the sum of its proper divisors (42514025442).

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

21100032030 is a wasteful number, since it uses less digits than its factorization.

21100032030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830422 (or 830411 counting only the distinct ones).

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

Adding to 21100032030 its reverse (3023000112), we get a palindrome (24123032142).

The spelling of 21100032030 in words is "twenty-one billion, one hundred million, thirty-two thousand, thirty".