21032117570320 has 40 divisors (see below), whose sum is σ = 49015824672600. Its totient is φ = 8392864005120.

The previous prime is 21032117570209. The next prime is 21032117570323. The reversal of 21032117570320 is 2307571123012.

It can be written as a sum of positive squares in 4 ways, for example, as 999296123904 + 20032821446416 = 999648^2 + 4475804^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (21032117570323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312200845 + ... + 312268204.

It is an arithmetic number, because the mean of its divisors is an integer number (1225395616815).

Almost surely, 2^{21032117570320} is an apocalyptic number.

21032117570320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21032117570320 is an abundant number, since it is smaller than the sum of its proper divisors (27983707102280).

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

21032117570320 is a wasteful number, since it uses less digits than its factorization.

21032117570320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624469483 (or 624469477 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

Adding to 21032117570320 its reverse (2307571123012), we get a palindrome (23339688693332).

The spelling of 21032117570320 in words is "twenty-one trillion, thirty-two billion, one hundred seventeen million, five hundred seventy thousand, three hundred twenty".