18348117514261 has 4 divisors (see below), whose sum is σ = 18844012582252. Its totient is φ = 17852222446272.

The previous prime is 18348117514163. The next prime is 18348117514303. The reversal of 18348117514261 is 16241571184381.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13484685622500 + 4863431891761 = 3672150^2 + 2205319^2 .

It is a cyclic number.

It is not a de Polignac number, because 18348117514261 - 2⁴¹ = 16149094258709 is a prime.

It is a super-2 number, since 2×18348117514261² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18348117514199 and 18348117514208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18348117514061) 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, 247947533940 + ... + 247947534013.

It is an arithmetic number, because the mean of its divisors is an integer number (4711003145563).

Almost surely, 2^{18348117514261} is an apocalyptic number.

It is an amenable number.

18348117514261 is a deficient number, since it is larger than the sum of its proper divisors (495895067991).

18348117514261 is an equidigital number, since it uses as much as digits as its factorization.

18348117514261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495895067990.

The product of its digits is 1290240, while the sum is 52.

The spelling of 18348117514261 in words is "eighteen trillion, three hundred forty-eight billion, one hundred seventeen million, five hundred fourteen thousand, two hundred sixty-one".