20868277 has 4 divisors (see below), whose sum is σ = 20892096. Its totient is φ = 20844460.

The previous prime is 20868271. The next prime is 20868293. The reversal of 20868277 is 77286802.

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 20868277 - 2³ = 20868269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20868271) 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, 10543 + ... + 12364.

It is an arithmetic number, because the mean of its divisors is an integer number (5223024).

Almost surely, 2^20868277 is an apocalyptic number.

It is an amenable number.

20868277 is a deficient number, since it is larger than the sum of its proper divisors (23819).

20868277 is an equidigital number, since it uses as much as digits as its factorization.

20868277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23818.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 20868277 is about 4568.1809289913. The cubic root of 20868277 is about 275.3143600687.

The spelling of 20868277 in words is "twenty million, eight hundred sixty-eight thousand, two hundred seventy-seven".