20606525 has 12 divisors (see below), whose sum is σ = 25808244. Its totient is φ = 16320000.

The previous prime is 20606491. The next prime is 20606527. The reversal of 20606525 is 52560602.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 148996 + 20457529 = 386^2 + 4523^2 .

It is not a de Polignac number, because 20606525 - 2⁶ = 20606461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20606494 and 20606503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1556 + ... + 6605.

It is an arithmetic number, because the mean of its divisors is an integer number (2150687).

Almost surely, 2^20606525 is an apocalyptic number.

20606525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20606525 is a deficient number, since it is larger than the sum of its proper divisors (5201719).

20606525 is a wasteful number, since it uses less digits than its factorization.

20606525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8272 (or 8267 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20606525 is about 4539.4410448865. The cubic root of 20606525 is about 274.1584188763.

The spelling of 20606525 in words is "twenty million, six hundred six thousand, five hundred twenty-five".