20130425 has 18 divisors (see below), whose sum is σ = 29038878. Its totient is φ = 13802880.

The previous prime is 20130413. The next prime is 20130449. The reversal of 20130425 is 52403102.

It can be written as a sum of positive squares in 3 ways, for example, as 6210064 + 13920361 = 2492^2 + 3731^2 .

It is not a de Polignac number, because 20130425 - 2⁸ = 20130169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6992 + ... + 9441.

It is an arithmetic number, because the mean of its divisors is an integer number (1613271).

Almost surely, 2^20130425 is an apocalyptic number.

20130425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20130425 is a deficient number, since it is larger than the sum of its proper divisors (8908453).

20130425 is a wasteful number, since it uses less digits than its factorization.

20130425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16457 (or 16445 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20130425 is about 4486.6942173498. The cubic root of 20130425 is about 272.0305302020.

Adding to 20130425 its reverse (52403102), we get a palindrome (72533527).

The spelling of 20130425 in words is "twenty million, one hundred thirty thousand, four hundred twenty-five".