20266285 has 16 divisors (see below), whose sum is σ = 26361216. Its totient is φ = 14868288.

The previous prime is 20266283. The next prime is 20266297. The reversal of 20266285 is 58266202.

It is a cyclic number.

It is not a de Polignac number, because 20266285 - 2¹ = 20266283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9922 + ... + 11788.

It is an arithmetic number, because the mean of its divisors is an integer number (1647576).

Almost surely, 2^20266285 is an apocalyptic number.

It is an amenable number.

20266285 is a deficient number, since it is larger than the sum of its proper divisors (6094931).

20266285 is a wasteful number, since it uses less digits than its factorization.

20266285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20266285 is about 4501.8090808030. The cubic root of 20266285 is about 272.6411355417.

The spelling of 20266285 in words is "twenty million, two hundred sixty-six thousand, two hundred eighty-five".