20003123225 has 24 divisors (see below), whose sum is σ = 25102435008. Its totient is φ = 15810552000.

The previous prime is 20003123213. The next prime is 20003123243. The reversal of 20003123225 is 52232130002.

It is not a de Polignac number, because 20003123225 - 2¹⁰ = 20003122201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003123197 and 20003123206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1221542 + ... + 1237808.

It is an arithmetic number, because the mean of its divisors is an integer number (1045934792).

Almost surely, 2^20003123225 is an apocalyptic number.

20003123225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20003123225 is a deficient number, since it is larger than the sum of its proper divisors (5099311783).

20003123225 is a wasteful number, since it uses less digits than its factorization.

20003123225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16865 (or 16860 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20003123225 its reverse (52232130002), we get a palindrome (72235253227).

The spelling of 20003123225 in words is "twenty billion, three million, one hundred twenty-three thousand, two hundred twenty-five".