18684081898 has 8 divisors (see below), whose sum is σ = 28444423392. Its totient is φ = 9202607436.

The previous prime is 18684081883. The next prime is 18684081907. The reversal of 18684081898 is 89818048681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69716590 + ... + 69716857.

It is an arithmetic number, because the mean of its divisors is an integer number (3555552924).

Almost surely, 2^18684081898 is an apocalyptic number.

18684081898 is a deficient number, since it is larger than the sum of its proper divisors (9760341494).

18684081898 is a wasteful number, since it uses less digits than its factorization.

18684081898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139433516.

The product of its (nonzero) digits is 7077888, while the sum is 61.

The spelling of 18684081898 in words is "eighteen billion, six hundred eighty-four million, eighty-one thousand, eight hundred ninety-eight".