20125830 has 32 divisors (see below), whose sum is σ = 48621024. Its totient is φ = 5331456.

The previous prime is 20125829. The next prime is 20125843. The reversal of 20125830 is 3852102.

20125830 is nontrivially palindromic in base 12.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20125797 and 20125806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2574 + ... + 6846.

It is an arithmetic number, because the mean of its divisors is an integer number (1519407).

Almost surely, 2^20125830 is an apocalyptic number.

20125830 is an abundant number, since it is smaller than the sum of its proper divisors (28495194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20125830 is a wasteful number, since it uses less digits than its factorization.

20125830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20125830 is about 4486.1821184611. The cubic root of 20125830 is about 272.0098305991.

Adding to 20125830 its reverse (3852102), we get a palindrome (23977932).

The spelling of 20125830 in words is "twenty million, one hundred twenty-five thousand, eight hundred thirty".