21010220032 has 176 divisors, whose sum is σ = 45842319360. Its totient is φ = 9587916800.

The previous prime is 21010220027. The next prime is 21010220039. The reversal of 21010220032 is 23002201012.

It is a junction number, because it is equal to n+sod(n) for n = 21010219994 and 21010220021.

It is not an unprimeable number, because it can be changed into a prime (21010220039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110001057 + ... + 110001247.

Almost surely, 2^21010220032 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 21010220032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22921159680).

21010220032 is an abundant number, since it is smaller than the sum of its proper divisors (24832099328).

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

21010220032 is a wasteful number, since it uses less digits than its factorization.

21010220032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21010220032 its reverse (23002201012), we get a palindrome (44012421044).

The spelling of 21010220032 in words is "twenty-one billion, ten million, two hundred twenty thousand, thirty-two".