20446867 has 6 divisors (see below), whose sum is σ = 23785188. Its totient is φ = 17525844.

The previous prime is 20446861. The next prime is 20446871. The reversal of 20446867 is 76864402.

It is not a de Polignac number, because 20446867 - 2¹¹ = 20444819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20446861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208593 + ... + 208690.

It is an arithmetic number, because the mean of its divisors is an integer number (3964198).

Almost surely, 2^20446867 is an apocalyptic number.

20446867 is a deficient number, since it is larger than the sum of its proper divisors (3338321).

20446867 is an equidigital number, since it uses as much as digits as its factorization.

20446867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417297 (or 417290 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 20446867 is about 4521.8212038956. The cubic root of 20446867 is about 273.4485285152.

It can be divided in two parts, 2044 and 6867, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 20446867 in words is "twenty million, four hundred forty-six thousand, eight hundred sixty-seven".