20867011 has 4 divisors (see below), whose sum is σ = 22764024. Its totient is φ = 18970000.

The previous prime is 20866969. The next prime is 20867023. The reversal of 20867011 is 11076802.

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

It is a cyclic number.

It is not a de Polignac number, because 20867011 - 2¹³ = 20858819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20867051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 948490 + ... + 948511.

It is an arithmetic number, because the mean of its divisors is an integer number (5691006).

Almost surely, 2^20867011 is an apocalyptic number.

20867011 is a deficient number, since it is larger than the sum of its proper divisors (1897013).

20867011 is a wasteful number, since it uses less digits than its factorization.

20867011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897012.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 20867011 is about 4568.0423596985. The cubic root of 20867011 is about 275.3087925266.

The spelling of 20867011 in words is "twenty million, eight hundred sixty-seven thousand, eleven".