20231021033 has 4 divisors (see below), whose sum is σ = 20233787268. Its totient is φ = 20228254800.

The previous prime is 20231020993. The next prime is 20231021101. The reversal of 20231021033 is 33012013202.

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 35200489 + 20195820544 = 5933^2 + 142112^2 .

It is a cyclic number.

It is not a de Polignac number, because 20231021033 - 2¹⁰ = 20231020009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20231021233) 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, 1372118 + ... + 1386783.

It is an arithmetic number, because the mean of its divisors is an integer number (5058446817).

Almost surely, 2^20231021033 is an apocalyptic number.

It is an amenable number.

20231021033 is a deficient number, since it is larger than the sum of its proper divisors (2766235).

20231021033 is an equidigital number, since it uses as much as digits as its factorization.

20231021033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766234.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20231021033 its reverse (33012013202), we get a palindrome (53243034235).

The spelling of 20231021033 in words is "twenty billion, two hundred thirty-one million, twenty-one thousand, thirty-three".