20247117 has 8 divisors (see below), whose sum is σ = 29450400. Its totient is φ = 12270960.

The previous prime is 20247079. The next prime is 20247127. The reversal of 20247117 is 71174202.

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

It is not a de Polignac number, because 20247117 - 2⁶ = 20247053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247127) 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, 306742 + ... + 306807.

It is an arithmetic number, because the mean of its divisors is an integer number (3681300).

Almost surely, 2^20247117 is an apocalyptic number.

It is an amenable number.

20247117 is a deficient number, since it is larger than the sum of its proper divisors (9203283).

20247117 is a wasteful number, since it uses less digits than its factorization.

20247117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613563.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 20247117 is about 4499.6796552644. The cubic root of 20247117 is about 272.5551531043. Note that the first 3 decimals are identical.

The spelling of 20247117 in words is "twenty million, two hundred forty-seven thousand, one hundred seventeen".