20317883 has 4 divisors (see below), whose sum is σ = 20515248. Its totient is φ = 20120520.

The previous prime is 20317877. The next prime is 20317903. The reversal of 20317883 is 38871302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20317883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20317853) 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 3 ways as a sum of consecutive naturals, for example, 98528 + ... + 98733.

It is an arithmetic number, because the mean of its divisors is an integer number (5128812).

Almost surely, 2^20317883 is an apocalyptic number.

20317883 is a deficient number, since it is larger than the sum of its proper divisors (197365).

20317883 is a wasteful number, since it uses less digits than its factorization.

20317883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197364.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20317883 is about 4507.5362450013. The cubic root of 20317883 is about 272.8723210688.

The spelling of 20317883 in words is "twenty million, three hundred seventeen thousand, eight hundred eighty-three".