20266005 has 16 divisors (see below), whose sum is σ = 32567040. Its totient is φ = 10761408.

The previous prime is 20266003. The next prime is 20266007. The reversal of 20266005 is 50066202.

It is an interprime number because it is at equal distance from previous prime (20266003) and next prime (20266007).

It is not a de Polignac number, because 20266005 - 2¹ = 20266003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266003) 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, 759 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (2035440).

Almost surely, 2^20266005 is an apocalyptic number.

It is an amenable number.

20266005 is a deficient number, since it is larger than the sum of its proper divisors (12301035).

20266005 is a wasteful number, since it uses less digits than its factorization.

20266005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5900.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20266005 is about 4501.7779820866. Note that the first 3 decimals coincide. The cubic root of 20266005 is about 272.6398799281.

The spelling of 20266005 in words is "twenty million, two hundred sixty-six thousand, five".