20030123205 has 32 divisors (see below), whose sum is σ = 35795589120. Its totient is φ = 10626788160.

The previous prime is 20030123203. The next prime is 20030123213. The reversal of 20030123205 is 50232103002.

It is not a de Polignac number, because 20030123205 - 2¹ = 20030123203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030123203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 362622 + ... + 414191.

It is an arithmetic number, because the mean of its divisors is an integer number (1118612160).

Almost surely, 2^20030123205 is an apocalyptic number.

It is an amenable number.

20030123205 is a deficient number, since it is larger than the sum of its proper divisors (15765465915).

20030123205 is a wasteful number, since it uses less digits than its factorization.

20030123205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777018 (or 777012 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 20030123205 its reverse (50232103002), we get a palindrome (70262226207).

The spelling of 20030123205 in words is "twenty billion, thirty million, one hundred twenty-three thousand, two hundred five".