20371717 has 8 divisors (see below), whose sum is σ = 21162240. Its totient is φ = 19587120.

The previous prime is 20371699. The next prime is 20371733. The reversal of 20371717 is 71717302.

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

It is a cyclic number.

It is not a de Polignac number, because 20371717 - 2²³ = 11983109 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 (20371777) 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, 6292 + ... + 8962.

It is an arithmetic number, because the mean of its divisors is an integer number (2645280).

Almost surely, 2^20371717 is an apocalyptic number.

It is an amenable number.

20371717 is a deficient number, since it is larger than the sum of its proper divisors (790523).

20371717 is a wasteful number, since it uses less digits than its factorization.

20371717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963.

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

The square root of 20371717 is about 4513.5038495608. The cubic root of 20371717 is about 273.1131081892.

The spelling of 20371717 in words is "twenty million, three hundred seventy-one thousand, seven hundred seventeen".