20206625 has 32 divisors (see below), whose sum is σ = 27529632. Its totient is φ = 14745600.

The previous prime is 20206609. The next prime is 20206631. The reversal of 20206625 is 52660202.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 1682209 + 18524416 = 1297^2 + 4304^2 .

It is not a de Polignac number, because 20206625 - 2⁴ = 20206609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20206625.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78497 + ... + 78753.

It is an arithmetic number, because the mean of its divisors is an integer number (860301).

Almost surely, 2^20206625 is an apocalyptic number.

20206625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20206625 is a deficient number, since it is larger than the sum of its proper divisors (7323007).

20206625 is a wasteful number, since it uses less digits than its factorization.

20206625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20206625 is about 4495.1779720051. The cubic root of 20206625 is about 272.3733384362.

Adding to 20206625 its reverse (52660202), we get a palindrome (72866827).

The spelling of 20206625 in words is "twenty million, two hundred six thousand, six hundred twenty-five".