20317771 has 16 divisors (see below), whose sum is σ = 22394880. Its totient is φ = 18355840.

The previous prime is 20317757. The next prime is 20317799. The reversal of 20317771 is 17771302.

It is a cyclic number.

It is not a de Polignac number, because 20317771 - 2⁷ = 20317643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20317711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46926 + ... + 47356.

It is an arithmetic number, because the mean of its divisors is an integer number (1399680).

Almost surely, 2^20317771 is an apocalyptic number.

20317771 is a deficient number, since it is larger than the sum of its proper divisors (2077109).

20317771 is a wasteful number, since it uses less digits than its factorization.

20317771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 20317771 is about 4507.5238213458. The cubic root of 20317771 is about 272.8718196755.

The spelling of 20317771 in words is "twenty million, three hundred seventeen thousand, seven hundred seventy-one".