18030117818 has 32 divisors (see below), whose sum is σ = 28767623040. Its totient is φ = 8457697600.

The previous prime is 18030117817. The next prime is 18030117827. The reversal of 18030117818 is 81871103081.

It is a super-2 number, since 2×18030117818² (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 (18030117817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478988 + ... + 515256.

It is an arithmetic number, because the mean of its divisors is an integer number (898988220).

Almost surely, 2^18030117818 is an apocalyptic number.

18030117818 is a deficient number, since it is larger than the sum of its proper divisors (10737505222).

18030117818 is a wasteful number, since it uses less digits than its factorization.

18030117818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36502.

The product of its (nonzero) digits is 10752, while the sum is 38.

The spelling of 18030117818 in words is "eighteen billion, thirty million, one hundred seventeen thousand, eight hundred eighteen".