21303253032 has 48 divisors (see below), whose sum is σ = 53998014240. Its totient is φ = 7003767168.

The previous prime is 21303253031. The next prime is 21303253079. The reversal of 21303253032 is 23035230312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21303252993 and 21303253011.

It is not an unprimeable number, because it can be changed into a prime (21303253031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44613 + ... + 211179.

It is an arithmetic number, because the mean of its divisors is an integer number (1124958630).

Almost surely, 2^21303253032 is an apocalyptic number.

It is an amenable number.

21303253032 is an abundant number, since it is smaller than the sum of its proper divisors (32694761208).

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

21303253032 is a wasteful number, since it uses less digits than its factorization.

21303253032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166722 (or 166645 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

Adding to 21303253032 its reverse (23035230312), we get a palindrome (44338483344).

The spelling of 21303253032 in words is "twenty-one billion, three hundred three million, two hundred fifty-three thousand, thirty-two".