20718383 has 8 divisors (see below), whose sum is σ = 24494880. Its totient is φ = 17146080.

The previous prime is 20718353. The next prime is 20718403. The reversal of 20718383 is 38381702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20718383 - 2¹⁴ = 20701999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20718353) 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 7 ways as a sum of consecutive naturals, for example, 50828 + ... + 51233.

It is an arithmetic number, because the mean of its divisors is an integer number (3061860).

Almost surely, 2^20718383 is an apocalyptic number.

20718383 is a deficient number, since it is larger than the sum of its proper divisors (3776497).

20718383 is a wasteful number, since it uses less digits than its factorization.

20718383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102097.

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

The square root of 20718383 is about 4551.7450499781. The cubic root of 20718383 is about 274.6535935811.

The spelling of 20718383 in words is "twenty million, seven hundred eighteen thousand, three hundred eighty-three".