20102771 has 8 divisors (see below), whose sum is σ = 22396080. Its totient is φ = 17916192.

The previous prime is 20102743. The next prime is 20102807. The reversal of 20102771 is 17720102.

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

It is a cyclic number.

It is not a de Polignac number, because 20102771 - 2⁶ = 20102707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26285 + ... + 27038.

It is an arithmetic number, because the mean of its divisors is an integer number (2799510).

Almost surely, 2^20102771 is an apocalyptic number.

20102771 is a deficient number, since it is larger than the sum of its proper divisors (2293309).

20102771 is a wasteful number, since it uses less digits than its factorization.

20102771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53365.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 20102771 is about 4483.6113792344. The cubic root of 20102771 is about 271.9059065758.

Adding to 20102771 its reverse (17720102), we get a palindrome (37822873).

The spelling of 20102771 in words is "twenty million, one hundred two thousand, seven hundred seventy-one".