20201203423 has 4 divisors (see below), whose sum is σ = 20201512288. Its totient is φ = 20200894560.

The previous prime is 20201203403. The next prime is 20201203453. The reversal of 20201203423 is 32430210202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201203423 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 20201203423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201203403) 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, 13383 + ... + 201448.

It is an arithmetic number, because the mean of its divisors is an integer number (5050378072).

Almost surely, 2^20201203423 is an apocalyptic number.

20201203423 is a deficient number, since it is larger than the sum of its proper divisors (308865).

20201203423 is an equidigital number, since it uses as much as digits as its factorization.

20201203423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308864.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20201203423 its reverse (32430210202), we get a palindrome (52631413625).

The spelling of 20201203423 in words is "twenty billion, two hundred one million, two hundred three thousand, four hundred twenty-three".