18454387818 has 16 divisors (see below), whose sum is σ = 37040126976. Its totient is φ = 6129570720.

The previous prime is 18454387817. The next prime is 18454387891. The reversal of 18454387818 is 81878345481.

It is a super-2 number, since 2×18454387818² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18454387817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5471146 + ... + 5474517.

It is an arithmetic number, because the mean of its divisors is an integer number (2315007936).

Almost surely, 2^18454387818 is an apocalyptic number.

18454387818 is an abundant number, since it is smaller than the sum of its proper divisors (18585739158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18454387818 is a wasteful number, since it uses less digits than its factorization.

18454387818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10945949.

The product of its digits is 6881280, while the sum is 57.

The spelling of 18454387818 in words is "eighteen billion, four hundred fifty-four million, three hundred eighty-seven thousand, eight hundred eighteen".