20777271 has 8 divisors (see below), whose sum is σ = 28157424. Its totient is φ = 13624320.

The previous prime is 20777269. The next prime is 20777287. The reversal of 20777271 is 17277702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20777271 - 2¹ = 20777269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20777231) 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 7 ways as a sum of consecutive naturals, for example, 56586 + ... + 56951.

It is an arithmetic number, because the mean of its divisors is an integer number (3519678).

Almost surely, 2^20777271 is an apocalyptic number.

20777271 is a deficient number, since it is larger than the sum of its proper divisors (7380153).

20777271 is a wasteful number, since it uses less digits than its factorization.

20777271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113601.

The product of its (nonzero) digits is 9604, while the sum is 33.

The square root of 20777271 is about 4558.2091878280. The cubic root of 20777271 is about 274.9135640195.

The spelling of 20777271 in words is "twenty million, seven hundred seventy-seven thousand, two hundred seventy-one".