18414751517 has 4 divisors (see below), whose sum is σ = 18415836960. Its totient is φ = 18413666076.

The previous prime is 18414751507. The next prime is 18414751529. The reversal of 18414751517 is 71515741481.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71515741481 = 80611 ⋅887171.

It is a cyclic number.

It is not a de Polignac number, because 18414751517 - 2⁴ = 18414751501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18414751507) 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, 516863 + ... + 551340.

It is an arithmetic number, because the mean of its divisors is an integer number (4603959240).

Almost surely, 2^18414751517 is an apocalyptic number.

It is an amenable number.

18414751517 is a deficient number, since it is larger than the sum of its proper divisors (1085443).

18414751517 is a wasteful number, since it uses less digits than its factorization.

18414751517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085442.

The product of its digits is 156800, while the sum is 44.

The spelling of 18414751517 in words is "eighteen billion, four hundred fourteen million, seven hundred fifty-one thousand, five hundred seventeen".