20873267 has 4 divisors (see below), whose sum is σ = 21971880. Its totient is φ = 19774656.

The previous prime is 20873257. The next prime is 20873269. The reversal of 20873267 is 76237802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76237802 = 2 ⋅38118901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20873267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20873269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549278 + ... + 549315.

It is an arithmetic number, because the mean of its divisors is an integer number (5492970).

Almost surely, 2^20873267 is an apocalyptic number.

20873267 is a deficient number, since it is larger than the sum of its proper divisors (1098613).

20873267 is a wasteful number, since it uses less digits than its factorization.

20873267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098612.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 20873267 is about 4568.7270656059. The cubic root of 20873267 is about 275.3363026112.

The spelling of 20873267 in words is "twenty million, eight hundred seventy-three thousand, two hundred sixty-seven".