20002117 has 4 divisors (see below), whose sum is σ = 21054880. Its totient is φ = 18949356.

The previous prime is 20002097. The next prime is 20002123. The reversal of 20002117 is 71120002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20002117 - 2¹¹ = 20000069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002097 and 20002106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002187) 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 3 ways as a sum of consecutive naturals, for example, 526353 + ... + 526390.

It is an arithmetic number, because the mean of its divisors is an integer number (5263720).

Almost surely, 2^20002117 is an apocalyptic number.

It is an amenable number.

20002117 is a deficient number, since it is larger than the sum of its proper divisors (1052763).

20002117 is a wasteful number, since it uses less digits than its factorization.

20002117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052762.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 20002117 is about 4472.3726365320. The cubic root of 20002117 is about 271.4513386917.

Adding to 20002117 its reverse (71120002), we get a palindrome (91122119).

The spelling of 20002117 in words is "twenty million, two thousand, one hundred seventeen".