20266165 has 8 divisors (see below), whose sum is σ = 24837120. Its totient is φ = 15867792.

The previous prime is 20266153. The next prime is 20266171. The reversal of 20266165 is 56166202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20266165 - 2¹⁹ = 19741877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42885 + ... + 43354.

It is an arithmetic number, because the mean of its divisors is an integer number (3104640).

Almost surely, 2^20266165 is an apocalyptic number.

It is an amenable number.

20266165 is a deficient number, since it is larger than the sum of its proper divisors (4570955).

20266165 is an equidigital number, since it uses as much as digits as its factorization.

20266165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86291.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20266165 is about 4501.7957528080. The cubic root of 20266165 is about 272.6405974230.

The spelling of 20266165 in words is "twenty million, two hundred sixty-six thousand, one hundred sixty-five".