20205338633 has 4 divisors (see below), whose sum is σ = 20206318800. Its totient is φ = 20204358468.

The previous prime is 20205338603. The next prime is 20205338639. The reversal of 20205338633 is 33683350202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33683350202 = 2 ⋅16841675101.

It is a cyclic number.

It is not a de Polignac number, because 20205338633 - 2¹² = 20205334537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20205338593 and 20205338602.

It is not an unprimeable number, because it can be changed into a prime (20205338639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458483 + ... + 500616.

It is an arithmetic number, because the mean of its divisors is an integer number (5051579700).

Almost surely, 2^20205338633 is an apocalyptic number.

It is an amenable number.

20205338633 is a deficient number, since it is larger than the sum of its proper divisors (980167).

20205338633 is an equidigital number, since it uses as much as digits as its factorization.

20205338633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980166.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 20205338633 its reverse (33683350202), we get a palindrome (53888688835).

The spelling of 20205338633 in words is "twenty billion, two hundred five million, three hundred thirty-eight thousand, six hundred thirty-three".