21103233032 has 64 divisors (see below), whose sum is σ = 45892337280. Its totient is φ = 8910300672.

The previous prime is 21103232957. The next prime is 21103233059. The reversal of 21103233032 is 23033230112.

It is a junction number, because it is equal to n+sod(n) for n = 21103232995 and 21103233013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4465823 + ... + 4470545.

It is an arithmetic number, because the mean of its divisors is an integer number (717067770).

Almost surely, 2^21103233032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21103233032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22946168640).

21103233032 is an abundant number, since it is smaller than the sum of its proper divisors (24789104248).

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

21103233032 is a wasteful number, since it uses less digits than its factorization.

21103233032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902 (or 5898 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21103233032 its reverse (23033230112), we get a palindrome (44136463144).

The spelling of 21103233032 in words is "twenty-one billion, one hundred three million, two hundred thirty-three thousand, thirty-two".