20420040203 has 4 divisors (see below), whose sum is σ = 20449592328. Its totient is φ = 20390488080.

The previous prime is 20420040103. The next prime is 20420040209. The reversal of 20420040203 is 30204002402.

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 20420040203 - 2²⁴ = 20403262987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20420040209) 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, 14775026 + ... + 14776407.

It is an arithmetic number, because the mean of its divisors is an integer number (5112398082).

Almost surely, 2^20420040203 is an apocalyptic number.

20420040203 is a deficient number, since it is larger than the sum of its proper divisors (29552125).

20420040203 is an equidigital number, since it uses as much as digits as its factorization.

20420040203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29552124.

The product of its (nonzero) digits is 384, while the sum is 17.

Adding to 20420040203 its reverse (30204002402), we get a palindrome (50624042605).

The spelling of 20420040203 in words is "twenty billion, four hundred twenty million, forty thousand, two hundred three".