20205650203 has 16 divisors (see below), whose sum is σ = 21600730944. Its totient is φ = 18834278400.

The previous prime is 20205650189. The next prime is 20205650221. The reversal of 20205650203 is 30205650202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20205650203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20205650273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853401 + ... + 876757.

It is an arithmetic number, because the mean of its divisors is an integer number (1350045684).

Almost surely, 2^20205650203 is an apocalyptic number.

20205650203 is a deficient number, since it is larger than the sum of its proper divisors (1395080741).

20205650203 is a wasteful number, since it uses less digits than its factorization.

20205650203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23862.

The product of its (nonzero) digits is 3600, while the sum is 25.

Subtracting 20205650203 from its reverse (30205650202), we obtain a palindrome (9999999999).

The spelling of 20205650203 in words is "twenty billion, two hundred five million, six hundred fifty thousand, two hundred three".