20117504772151 has 4 divisors (see below), whose sum is σ = 20139159783600. Its totient is φ = 20095849760704.

The previous prime is 20117504772097. The next prime is 20117504772181. The reversal of 20117504772151 is 15127740571102.

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

It is a cyclic number.

It is not a de Polignac number, because 20117504772151 - 2¹³ = 20117504763959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20117504772098 and 20117504772107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117504772181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10827504331 + ... + 10827506188.

It is an arithmetic number, because the mean of its divisors is an integer number (5034789945900).

Almost surely, 2^{20117504772151} is an apocalyptic number.

20117504772151 is a deficient number, since it is larger than the sum of its proper divisors (21655011449).

20117504772151 is an equidigital number, since it uses as much as digits as its factorization.

20117504772151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21655011448.

The product of its (nonzero) digits is 137200, while the sum is 43.

The spelling of 20117504772151 in words is "twenty trillion, one hundred seventeen billion, five hundred four million, seven hundred seventy-two thousand, one hundred fifty-one".