18861098018 has 16 divisors (see below), whose sum is σ = 34235270784. Its totient is φ = 7607837760.

The previous prime is 18861098017. The next prime is 18861098023. The reversal of 18861098018 is 81089016881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18861098017) 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, 39623918 + ... + 39624393.

It is an arithmetic number, because the mean of its divisors is an integer number (2139704424).

Almost surely, 2^18861098018 is an apocalyptic number.

18861098018 is a deficient number, since it is larger than the sum of its proper divisors (15374172766).

18861098018 is a wasteful number, since it uses less digits than its factorization.

18861098018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79248337.

The product of its (nonzero) digits is 221184, while the sum is 50.

The spelling of 18861098018 in words is "eighteen billion, eight hundred sixty-one million, ninety-eight thousand, eighteen".