20625266 has 4 divisors (see below), whose sum is σ = 30937902. Its totient is φ = 10312632.

The previous prime is 20625263. The next prime is 20625271. The reversal of 20625266 is 66252602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14984641 + 5640625 = 3871^2 + 2375^2 .

It is not an unprimeable number, because it can be changed into a prime (20625263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5156315 + ... + 5156318.

Almost surely, 2^20625266 is an apocalyptic number.

20625266 is a deficient number, since it is larger than the sum of its proper divisors (10312636).

20625266 is a wasteful number, since it uses less digits than its factorization.

20625266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10312635.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20625266 is about 4541.5048166880. The cubic root of 20625266 is about 274.2415065730.

Adding to 20625266 its reverse (66252602), we get a palindrome (86877868).

The spelling of 20625266 in words is "twenty million, six hundred twenty-five thousand, two hundred sixty-six".