20002771 has 2 divisors, whose sum is σ = 20002772. Its totient is φ = 20002770.

The previous prime is 20002757. The next prime is 20002799. The reversal of 20002771 is 17720002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20002771 - 2⁵ = 20002739 is a prime.

It is a super-2 number, since 2×20002771² = 800221695356882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20012771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001385 + 10001386.

It is an arithmetic number, because the mean of its divisors is an integer number (10001386).

Almost surely, 2^20002771 is an apocalyptic number.

20002771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002771 is an equidigital number, since it uses as much as digits as its factorization.

20002771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20002771 is about 4472.4457514877. The cubic root of 20002771 is about 271.4542971659.

Adding to 20002771 its reverse (17720002), we get a palindrome (37722773).

The spelling of 20002771 in words is "twenty million, two thousand, seven hundred seventy-one".