20117511111254 has 4 divisors (see below), whose sum is σ = 30176266666884. Its totient is φ = 10058755555626.

The previous prime is 20117511111239. The next prime is 20117511111287. The reversal of 20117511111254 is 45211111571102.

It is a happy number.

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

It is a super-2 number, since 2×20117511111254² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20117511111254.

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, 5029377777812 + ... + 5029377777815.

It is an arithmetic number, because the mean of its divisors is an integer number (7544066666721).

Almost surely, 2^{20117511111254} is an apocalyptic number.

20117511111254 is a deficient number, since it is larger than the sum of its proper divisors (10058755555630).

20117511111254 is a wasteful number, since it uses less digits than its factorization.

20117511111254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10058755555629.

The product of its (nonzero) digits is 2800, while the sum is 32.

Adding to 20117511111254 its reverse (45211111571102), we get a palindrome (65328622682356).

The spelling of 20117511111254 in words is "twenty trillion, one hundred seventeen billion, five hundred eleven million, one hundred eleven thousand, two hundred fifty-four".