18214723547 has 8 divisors (see below), whose sum is σ = 18270019680. Its totient is φ = 18159462720.

The previous prime is 18214723531. The next prime is 18214723577. The reversal of 18214723547 is 74532741281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18214723547 - 2⁴ = 18214723531 is a prime.

It is a super-2 number, since 2×18214723547² (a number of 21 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 = 18214723498 and 18214723507.

It is not an unprimeable number, because it can be changed into a prime (18214723577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320647 + ... + 1334367.

It is an arithmetic number, because the mean of its divisors is an integer number (2283752460).

Almost surely, 2^18214723547 is an apocalyptic number.

18214723547 is a deficient number, since it is larger than the sum of its proper divisors (55296133).

18214723547 is a wasteful number, since it uses less digits than its factorization.

18214723547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17653.

The product of its digits is 376320, while the sum is 44.

The spelling of 18214723547 in words is "eighteen billion, two hundred fourteen million, seven hundred twenty-three thousand, five hundred forty-seven".