20321122033 has 4 divisors (see below), whose sum is σ = 20360126628. Its totient is φ = 20282117440.

The previous prime is 20321122027. The next prime is 20321122037. The reversal of 20321122033 is 33022112302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33022112302 = 2 ⋅16511056151.

It can be written as a sum of positive squares in 2 ways, for example, as 9046292544 + 11274829489 = 95112^2 + 106183^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321122033 - 2⁹ = 20321121521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20321122033.

It is not an unprimeable number, because it can be changed into a prime (20321122037) 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, 19501516 + ... + 19502557.

It is an arithmetic number, because the mean of its divisors is an integer number (5090031657).

Almost surely, 2^20321122033 is an apocalyptic number.

It is an amenable number.

20321122033 is a deficient number, since it is larger than the sum of its proper divisors (39004595).

20321122033 is an equidigital number, since it uses as much as digits as its factorization.

20321122033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39004594.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20321122033 its reverse (33022112302), we get a palindrome (53343234335).

The spelling of 20321122033 in words is "twenty billion, three hundred twenty-one million, one hundred twenty-two thousand, thirty-three".