20271771 has 12 divisors (see below), whose sum is σ = 31534048. Its totient is φ = 12474864.

The previous prime is 20271749. The next prime is 20271793. The reversal of 20271771 is 17717202.

It is an interprime number because it is at equal distance from previous prime (20271749) and next prime (20271793).

It is not a de Polignac number, because 20271771 - 2¹⁵ = 20239003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20272771) 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 11 ways as a sum of consecutive naturals, for example, 86515 + ... + 86748.

Almost surely, 2^20271771 is an apocalyptic number.

20271771 is a deficient number, since it is larger than the sum of its proper divisors (11262277).

20271771 is a wasteful number, since it uses less digits than its factorization.

20271771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173282 (or 173279 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 20271771 is about 4502.4183501758. The cubic root of 20271771 is about 272.6657342670.

Adding to 20271771 its reverse (17717202), we get a palindrome (37988973).

The spelling of 20271771 in words is "twenty million, two hundred seventy-one thousand, seven hundred seventy-one".