21020032320323 has 8 divisors (see below), whose sum is σ = 21098017329216. Its totient is φ = 20942180280000.

The previous prime is 21020032320269. The next prime is 21020032320349. The reversal of 21020032320323 is 32302323002012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21020032320323 - 2⁴⁰ = 19920520692547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020032320523) 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, 32925386 + ... + 33557727.

It is an arithmetic number, because the mean of its divisors is an integer number (2637252166152).

Almost surely, 2^{21020032320323} is an apocalyptic number.

21020032320323 is a deficient number, since it is larger than the sum of its proper divisors (77985008893).

21020032320323 is an equidigital number, since it uses as much as digits as its factorization.

21020032320323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66484285.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21020032320323 its reverse (32302323002012), we get a palindrome (53322355322335).

The spelling of 21020032320323 in words is "twenty-one trillion, twenty billion, thirty-two million, three hundred twenty thousand, three hundred twenty-three".