20003123320 has 16 divisors (see below), whose sum is σ = 45007027560. Its totient is φ = 8001249312.

The previous prime is 20003123311. The next prime is 20003123323. The reversal of 20003123320 is 2332130002.

It is a junction number, because it is equal to n+sod(n) for n = 20003123294 and 20003123303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003123323) 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, 250039002 + ... + 250039081.

Almost surely, 2^20003123320 is an apocalyptic number.

20003123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003123320 is an abundant number, since it is smaller than the sum of its proper divisors (25003904240).

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

20003123320 is a wasteful number, since it uses less digits than its factorization.

20003123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500078094 (or 500078090 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 20003123320 its reverse (2332130002), we get a palindrome (22335253322).

The spelling of 20003123320 in words is "twenty billion, three million, one hundred twenty-three thousand, three hundred twenty".