20106425 has 12 divisors (see below), whose sum is σ = 25792620. Its totient is φ = 15529920.

The previous prime is 20106421. The next prime is 20106469. The reversal of 20106425 is 52460102.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1607824 + 18498601 = 1268^2 + 4301^2 .

It is not a de Polignac number, because 20106425 - 2² = 20106421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20106397 and 20106406.

It is not an unprimeable number, because it can be changed into a prime (20106421) 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, 13142 + ... + 14591.

It is an arithmetic number, because the mean of its divisors is an integer number (2149385).

Almost surely, 2^20106425 is an apocalyptic number.

20106425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20106425 is a deficient number, since it is larger than the sum of its proper divisors (5686195).

20106425 is a wasteful number, since it uses less digits than its factorization.

20106425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27772 (or 27767 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20106425 is about 4484.0188447418. The cubic root of 20106425 is about 271.9223799929.

Adding to 20106425 its reverse (52460102), we get a palindrome (72566527).

The spelling of 20106425 in words is "twenty million, one hundred six thousand, four hundred twenty-five".