21010333232 has 160 divisors (see below), whose sum is σ = 48698133120. Its totient is φ = 8595210240.

The previous prime is 21010333207. The next prime is 21010333241. The reversal of 21010333232 is 23233301012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78105194 + ... + 78105462.

It is an arithmetic number, because the mean of its divisors is an integer number (304363332).

Almost surely, 2^21010333232 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 21010333232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24349066560).

21010333232 is an abundant number, since it is smaller than the sum of its proper divisors (27687799888).

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

21010333232 is a wasteful number, since it uses less digits than its factorization.

21010333232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 625 counting only the distinct ones).

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

Adding to 21010333232 its reverse (23233301012), we get a palindrome (44243634244).

The spelling of 21010333232 in words is "twenty-one billion, ten million, three hundred thirty-three thousand, two hundred thirty-two".