20433313105 has 4 divisors (see below), whose sum is σ = 24519975732. Its totient is φ = 16346650480.

The previous prime is 20433313099. The next prime is 20433313139. The reversal of 20433313105 is 50131333402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50131333402 = 2 ⋅25065666701.

It can be written as a sum of positive squares in 2 ways, for example, as 13278183361 + 7155129744 = 115231^2 + 84588^2 .

It is not a de Polignac number, because 20433313105 - 2³ = 20433313097 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 20433313105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2043331306 + ... + 2043331315.

It is an arithmetic number, because the mean of its divisors is an integer number (6129993933).

Almost surely, 2^20433313105 is an apocalyptic number.

It is an amenable number.

20433313105 is a deficient number, since it is larger than the sum of its proper divisors (4086662627).

20433313105 is an equidigital number, since it uses as much as digits as its factorization.

20433313105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086662626.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 20433313105 its reverse (50131333402), we get a palindrome (70564646507).

The spelling of 20433313105 in words is "twenty billion, four hundred thirty-three million, three hundred thirteen thousand, one hundred five".