21000323020033 has 6 divisors (see below), whose sum is σ = 24428947186626. Its totient is φ = 18000276874272.

The previous prime is 21000323019979. The next prime is 21000323020051. The reversal of 21000323020033 is 33002032300012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18534471508224 + 2465851511809 = 4305168^2 + 1570303^2 .

It is not a de Polignac number, because 21000323020033 - 2¹³ = 21000323011841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000323050033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214289010360 + ... + 214289010457.

It is an arithmetic number, because the mean of its divisors is an integer number (4071491197771).

Almost surely, 2^{21000323020033} is an apocalyptic number.

It is an amenable number.

21000323020033 is a deficient number, since it is larger than the sum of its proper divisors (3428624166593).

21000323020033 is an equidigital number, since it uses as much as digits as its factorization.

21000323020033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428578020831 (or 428578020824 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21000323020033 its reverse (33002032300012), we get a palindrome (54002355320045).

The spelling of 21000323020033 in words is "twenty-one trillion, three hundred twenty-three million, twenty thousand, thirty-three".