20238717 has 8 divisors (see below), whose sum is σ = 27559296. Its totient is φ = 13205312.

The previous prime is 20238703. The next prime is 20238719. The reversal of 20238717 is 71783202.

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 20238717 - 2²³ = 11850109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238719) 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, 71628 + ... + 71909.

It is an arithmetic number, because the mean of its divisors is an integer number (3444912).

Almost surely, 2^20238717 is an apocalyptic number.

It is an amenable number.

20238717 is a deficient number, since it is larger than the sum of its proper divisors (7320579).

20238717 is a wasteful number, since it uses less digits than its factorization.

20238717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143587.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 20238717 is about 4498.7461586535. The cubic root of 20238717 is about 272.5174558860.

The spelling of 20238717 in words is "twenty million, two hundred thirty-eight thousand, seven hundred seventeen".