20112725 has 12 divisors (see below), whose sum is σ = 24995424. Its totient is φ = 16054320.

The previous prime is 20112721. The next prime is 20112727. The reversal of 20112725 is 52721102.

It is not a de Polignac number, because 20112725 - 2² = 20112721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112697 and 20112706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 21722 + ... + 22628.

It is an arithmetic number, because the mean of its divisors is an integer number (2082952).

Almost surely, 2^20112725 is an apocalyptic number.

20112725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20112725 is a deficient number, since it is larger than the sum of its proper divisors (4882699).

20112725 is an equidigital number, since it uses as much as digits as its factorization.

20112725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20112725 is about 4484.7212845393. The cubic root of 20112725 is about 271.9507777496.

Adding to 20112725 its reverse (52721102), we get a palindrome (72833827).

The spelling of 20112725 in words is "twenty million, one hundred twelve thousand, seven hundred twenty-five".