18618971046 has 16 divisors (see below), whose sum is σ = 40102399344. Its totient is φ = 5728914144.

The previous prime is 18618971029. The next prime is 18618971053. The reversal of 18618971046 is 64017981681.

It is a self number, because there is not a number n which added to its sum of digits gives 18618971046.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 119352301 + ... + 119352456.

It is an arithmetic number, because the mean of its divisors is an integer number (2506399959).

Almost surely, 2^18618971046 is an apocalyptic number.

18618971046 is an abundant number, since it is smaller than the sum of its proper divisors (21483428298).

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

18618971046 is a wasteful number, since it uses less digits than its factorization.

18618971046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238704775.

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 18618971046 in words is "eighteen billion, six hundred eighteen million, nine hundred seventy-one thousand, forty-six".