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20883 = 36961

20883 has 4 divisors (see below), whose sum is σ = 27848. Its totient is φ = 13920.

The previous prime is 20879. The next prime is 20887. The reversal of 20883 is 38802.

Adding to 20883 its reverse (38802), we get a triangular number (59685 = T345).

It can be divided in two parts, 20 and 883, that added together give a triangular number (903 = T42).

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20879) and next prime (20887).

It is not a de Polignac number, because 20883 - 22 = 20879 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3478 + ... + 3483.

It is an arithmetic number, because the mean of its divisors is an integer number (6962).

220883 is an apocalyptic number.

20883 is a deficient number, since it is larger than the sum of its proper divisors (6965).

20883 is an equidigital number, since it uses as much as digits as its factorization.

20883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20883 is about 144.5095152576. The cubic root of 20883 is about 27.5379091502.

The spelling of 20883 in words is "twenty thousand, eight hundred eighty-three".

Divisors: 1 3 6961 20883