20423412203 has 4 divisors (see below), whose sum is σ = 20711065968. Its totient is φ = 20135758440.

The previous prime is 20423412187. The next prime is 20423412221. The reversal of 20423412203 is 30221432402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20423412203 - 2⁴ = 20423412187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423412263) 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, 143826776 + ... + 143826917.

It is an arithmetic number, because the mean of its divisors is an integer number (5177766492).

Almost surely, 2^20423412203 is an apocalyptic number.

20423412203 is a deficient number, since it is larger than the sum of its proper divisors (287653765).

20423412203 is an equidigital number, since it uses as much as digits as its factorization.

20423412203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287653764.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20423412203 its reverse (30221432402), we get a palindrome (50644844605).

The spelling of 20423412203 in words is "twenty billion, four hundred twenty-three million, four hundred twelve thousand, two hundred three".