20420232233 has 4 divisors (see below), whose sum is σ = 20450130768. Its totient is φ = 20390333700.

The previous prime is 20420232223. The next prime is 20420232247. The reversal of 20420232233 is 33223202402.

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 20420232233 - 2⁶ = 20420232169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420232199 and 20420232208.

It is not an unprimeable number, because it can be changed into a prime (20420232223) 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, 14948243 + ... + 14949608.

It is an arithmetic number, because the mean of its divisors is an integer number (5112532692).

Almost surely, 2^20420232233 is an apocalyptic number.

It is an amenable number.

20420232233 is a deficient number, since it is larger than the sum of its proper divisors (29898535).

20420232233 is an equidigital number, since it uses as much as digits as its factorization.

20420232233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29898534.

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 20420232233 its reverse (33223202402), we get a palindrome (53643434635).

The spelling of 20420232233 in words is "twenty billion, four hundred twenty million, two hundred thirty-two thousand, two hundred thirty-three".