18604862818 has 4 divisors (see below), whose sum is σ = 27907294230. Its totient is φ = 9302431408.

The previous prime is 18604862803. The next prime is 18604862839. The reversal of 18604862818 is 81826840681.

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

It can be written as a sum of positive squares in only one way, i.e., 13730449329 + 4874413489 = 117177^2 + 69817^2 .

It is a super-2 number, since 2×18604862818² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4651215703 + ... + 4651215706.

Almost surely, 2^18604862818 is an apocalyptic number.

18604862818 is a deficient number, since it is larger than the sum of its proper divisors (9302431412).

18604862818 is an equidigital number, since it uses as much as digits as its factorization.

18604862818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302431411.

The product of its (nonzero) digits is 1179648, while the sum is 52.

The spelling of 18604862818 in words is "eighteen billion, six hundred four million, eight hundred sixty-two thousand, eight hundred eighteen".