20001323033 has 4 divisors (see below), whose sum is σ = 20005095780. Its totient is φ = 19997550288.

The previous prime is 20001322981. The next prime is 20001323053. The reversal of 20001323033 is 33032310002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 755865049 + 19245457984 = 27493^2 + 138728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001323033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001323053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1878410 + ... + 1889027.

It is an arithmetic number, because the mean of its divisors is an integer number (5001273945).

Almost surely, 2^20001323033 is an apocalyptic number.

It is an amenable number.

20001323033 is a deficient number, since it is larger than the sum of its proper divisors (3772747).

20001323033 is an equidigital number, since it uses as much as digits as its factorization.

20001323033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772746.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 20001323033 its reverse (33032310002), we get a palindrome (53033633035).

The spelling of 20001323033 in words is "twenty billion, one million, three hundred twenty-three thousand, thirty-three".