21102330020 has 48 divisors (see below), whose sum is σ = 45042117120. Its totient is φ = 8303291136.

The previous prime is 21102330017. The next prime is 21102330043. The reversal of 21102330020 is 2003320112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21102329977 and 21102330004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359501 + ... + 414059.

It is an arithmetic number, because the mean of its divisors is an integer number (938377440).

Almost surely, 2^21102330020 is an apocalyptic number.

21102330020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102330020 is an abundant number, since it is smaller than the sum of its proper divisors (23939787100).

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

21102330020 is a wasteful number, since it uses less digits than its factorization.

21102330020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54884 (or 54882 counting only the distinct ones).

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

Adding to 21102330020 its reverse (2003320112), we get a palindrome (23105650132).

The spelling of 21102330020 in words is "twenty-one billion, one hundred two million, three hundred thirty thousand, twenty".