20277 has 8 divisors (see below), whose sum is σ = 30080. Its totient is φ = 13500.

The previous prime is 20269. The next prime is 20287. The reversal of 20277 is 77202.

It is not a de Polignac number, because 20277 - 2³ = 20269 is a prime.

It is a super-2 number, since 2×20277² = 822313458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20287) 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, 349 + ... + 402.

It is an arithmetic number, because the mean of its divisors is an integer number (3760).

2²⁰²⁷⁷ is an apocalyptic number.

20277 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20277 is a deficient number, since it is larger than the sum of its proper divisors (9803).

20277 is an equidigital number, since it uses as much as digits as its factorization.

20277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 18.

The square root of 20277 is about 142.3973314357. The cubic root of 20277 is about 27.2689176497.

Adding to 20277 its reverse (77202), we get a palindrome (97479).

The spelling of 20277 in words is "twenty thousand, two hundred seventy-seven", and thus it is an iban number.