21310032352 has 24 divisors (see below), whose sum is σ = 47947573296. Its totient is φ = 9132870912.

The previous prime is 21310032349. The next prime is 21310032353. The reversal of 21310032352 is 25323001312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310032353) 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 3 ways as a sum of consecutive naturals, for example, 47566813 + ... + 47567260.

It is an arithmetic number, because the mean of its divisors is an integer number (1997815554).

Almost surely, 2^21310032352 is an apocalyptic number.

It is an amenable number.

21310032352 is an abundant number, since it is smaller than the sum of its proper divisors (26637540944).

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

21310032352 is an equidigital number, since it uses as much as digits as its factorization.

21310032352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95134090 (or 95134082 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 21310032352 its reverse (25323001312), we get a palindrome (46633033664).

The spelling of 21310032352 in words is "twenty-one billion, three hundred ten million, thirty-two thousand, three hundred fifty-two".