20030123204 has 24 divisors (see below), whose sum is σ = 43141804608. Its totient is φ = 7924004640.

The previous prime is 20030123203. The next prime is 20030123213. The reversal of 20030123204 is 40232103002.

It is a super-4 number, since 4×20030123204⁴ (a number of 42 digits) contains 4444 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27513542 + ... + 27514269.

It is an arithmetic number, because the mean of its divisors is an integer number (1797575192).

Almost surely, 2^20030123204 is an apocalyptic number.

It is an amenable number.

20030123204 is an abundant number, since it is smaller than the sum of its proper divisors (23111681404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20030123204 is a wasteful number, since it uses less digits than its factorization.

20030123204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55027835 (or 55027833 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20030123204 its reverse (40232103002), we get a palindrome (60262226206).

The spelling of 20030123204 in words is "twenty billion, thirty million, one hundred twenty-three thousand, two hundred four".