21030313032 has 192 divisors, whose sum is σ = 60275404800. Its totient is φ = 6614576640.

The previous prime is 21030313009. The next prime is 21030313033. The reversal of 21030313032 is 23031303012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21030312996 and 21030313014.

It is not an unprimeable number, because it can be changed into a prime (21030313033) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 18826938 + ... + 18828054.

It is an arithmetic number, because the mean of its divisors is an integer number (313934400).

Almost surely, 2^21030313032 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 21030313032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30137702400).

21030313032 is an abundant number, since it is smaller than the sum of its proper divisors (39245091768).

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

21030313032 is a wasteful number, since it uses less digits than its factorization.

21030313032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1349 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21030313032 its reverse (23031303012), we get a palindrome (44061616044).

The spelling of 21030313032 in words is "twenty-one billion, thirty million, three hundred thirteen thousand, thirty-two".