20420103233 has 4 divisors (see below), whose sum is σ = 20441667120. Its totient is φ = 20398539348.

The previous prime is 20420103191. The next prime is 20420103283. The reversal of 20420103233 is 33230102402.

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.

It is a cyclic number.

It is not a de Polignac number, because 20420103233 - 2⁶ = 20420103169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20420103283) 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, 10780523 + ... + 10782416.

It is an arithmetic number, because the mean of its divisors is an integer number (5110416780).

Almost surely, 2^20420103233 is an apocalyptic number.

It is an amenable number.

20420103233 is a deficient number, since it is larger than the sum of its proper divisors (21563887).

20420103233 is an equidigital number, since it uses as much as digits as its factorization.

20420103233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21563886.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20420103233 its reverse (33230102402), we get a palindrome (53650205635).

The spelling of 20420103233 in words is "twenty billion, four hundred twenty million, one hundred three thousand, two hundred thirty-three".