20125506 has 32 divisors (see below), whose sum is σ = 43037568. Its totient is φ = 6258560.

The previous prime is 20125471. The next prime is 20125513. The reversal of 20125506 is 60552102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3880 + ... + 7436.

It is an arithmetic number, because the mean of its divisors is an integer number (1344924).

Almost surely, 2^20125506 is an apocalyptic number.

20125506 is an abundant number, since it is smaller than the sum of its proper divisors (22912062).

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

20125506 is a wasteful number, since it uses less digits than its factorization.

20125506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20125506 is about 4486.1460074322. The cubic root of 20125506 is about 272.0083709217.

Adding to 20125506 its reverse (60552102), we get a palindrome (80677608).

The spelling of 20125506 in words is "twenty million, one hundred twenty-five thousand, five hundred six".