20920266 has 24 divisors (see below), whose sum is σ = 46184580. Its totient is φ = 6841536.

The previous prime is 20920259. The next prime is 20920301. The reversal of 20920266 is 66202902.

It can be written as a sum of positive squares in 2 ways, for example, as 16573041 + 4347225 = 4071^2 + 2085^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10011 + ... + 11918.

Almost surely, 2^20920266 is an apocalyptic number.

20920266 is an abundant number, since it is smaller than the sum of its proper divisors (25264314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20920266 is a wasteful number, since it uses less digits than its factorization.

20920266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21990 (or 21987 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20920266 is about 4573.8677287390. The cubic root of 20920266 is about 275.5428000826.

The spelling of 20920266 in words is "twenty million, nine hundred twenty thousand, two hundred sixty-six".