20311157341117 has 4 divisors (see below), whose sum is σ = 20966355965056. Its totient is φ = 19655958717180.

The previous prime is 20311157341061. The next prime is 20311157341127. The reversal of 20311157341117 is 71114375111302.

It is a happy number.

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 20311157341117 - 2¹⁹ = 20311156816829 is a prime.

It is a super-2 number, since 2×20311157341117² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311157341127) 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, 327599311923 + ... + 327599311984.

It is an arithmetic number, because the mean of its divisors is an integer number (5241588991264).

Almost surely, 2^{20311157341117} is an apocalyptic number.

It is an amenable number.

20311157341117 is a deficient number, since it is larger than the sum of its proper divisors (655198623939).

20311157341117 is an equidigital number, since it uses as much as digits as its factorization.

20311157341117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655198623938.

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 20311157341117 in words is "twenty trillion, three hundred eleven billion, one hundred fifty-seven million, three hundred forty-one thousand, one hundred seventeen".