20407125 has 16 divisors (see below), whose sum is σ = 33958080. Its totient is φ = 10883600.

The previous prime is 20407117. The next prime is 20407129. The reversal of 20407125 is 52170402.

It is not a de Polignac number, because 20407125 - 2³ = 20407117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20407129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26835 + ... + 27584.

It is an arithmetic number, because the mean of its divisors is an integer number (2122380).

Almost surely, 2^20407125 is an apocalyptic number.

20407125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20407125 is a deficient number, since it is larger than the sum of its proper divisors (13550955).

20407125 is an equidigital number, since it uses as much as digits as its factorization.

20407125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54437 (or 54427 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20407125 is about 4517.4245981532. The cubic root of 20407125 is about 273.2712488711.

Adding to 20407125 its reverse (52170402), we get a palindrome (72577527).

The spelling of 20407125 in words is "twenty million, four hundred seven thousand, one hundred twenty-five".