20117217182 has 4 divisors (see below), whose sum is σ = 30175825776. Its totient is φ = 10058608590.

The previous prime is 20117217179. The next prime is 20117217193. The reversal of 20117217182 is 28171271102.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20117217182² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5029304294 + ... + 5029304297.

It is an arithmetic number, because the mean of its divisors is an integer number (7543956444).

Almost surely, 2^20117217182 is an apocalyptic number.

20117217182 is a deficient number, since it is larger than the sum of its proper divisors (10058608594).

20117217182 is a wasteful number, since it uses less digits than its factorization.

20117217182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10058608593.

The product of its (nonzero) digits is 3136, while the sum is 32.

Adding to 20117217182 its reverse (28171271102), we get a palindrome (48288488284).

The spelling of 20117217182 in words is "twenty billion, one hundred seventeen million, two hundred seventeen thousand, one hundred eighty-two".