20864273 has 4 divisors (see below), whose sum is σ = 21158208. Its totient is φ = 20570340.

The previous prime is 20864231. The next prime is 20864281. The reversal of 20864273 is 37246802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20864273 - 2¹⁴ = 20847889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20864213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146861 + ... + 147002.

It is an arithmetic number, because the mean of its divisors is an integer number (5289552).

Almost surely, 2^20864273 is an apocalyptic number.

It is an amenable number.

20864273 is a deficient number, since it is larger than the sum of its proper divisors (293935).

20864273 is an equidigital number, since it uses as much as digits as its factorization.

20864273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293934.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20864273 is about 4567.7426591261. The cubic root of 20864273 is about 275.2967507374.

The spelling of 20864273 in words is "twenty million, eight hundred sixty-four thousand, two hundred seventy-three".