20003125 has 24 divisors (see below), whose sum is σ = 25826472. Its totient is φ = 15480000.

The previous prime is 20003117. The next prime is 20003131. The reversal of 20003125 is 52130002.

It can be written as a sum of positive squares in 12 ways, for example, as 15311569 + 4691556 = 3913^2 + 2166^2 .

It is not a de Polignac number, because 20003125 - 2³ = 20003117 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 115539 + ... + 115711.

It is an arithmetic number, because the mean of its divisors is an integer number (1076103).

Almost surely, 2^20003125 is an apocalyptic number.

20003125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20003125 is a deficient number, since it is larger than the sum of its proper divisors (5823347).

20003125 is an frugal number, since it uses more digits than its factorization.

20003125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20003125 is about 4472.4853269743. The cubic root of 20003125 is about 271.4558985150.

Adding to 20003125 its reverse (52130002), we get a palindrome (72133127).

It can be divided in two parts, 2000 and 3125, that multiplied together give a 4-th power (6250000 = 50⁴).

The spelling of 20003125 in words is "twenty million, three thousand, one hundred twenty-five".