20013125 has 40 divisors (see below), whose sum is σ = 28340928. Its totient is φ = 14000000.

The previous prime is 20013121. The next prime is 20013127. The reversal of 20013125 is 52131002.

It is a happy number.

It is not a de Polignac number, because 20013125 - 2² = 20013121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 281840 + ... + 281910.

Almost surely, 2^20013125 is an apocalyptic number.

20013125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20013125 is a deficient number, since it is larger than the sum of its proper divisors (8327803).

20013125 is an equidigital number, since it uses as much as digits as its factorization.

20013125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20013125 is about 4473.6031339402. The cubic root of 20013125 is about 271.5011265607.

Adding to 20013125 its reverse (52131002), we get a palindrome (72144127).

The spelling of 20013125 in words is "twenty million, thirteen thousand, one hundred twenty-five".