18429389898 has 16 divisors (see below), whose sum is σ = 37184965056. Its totient is φ = 6088765760.

The previous prime is 18429389863. The next prime is 18429389917. The reversal of 18429389898 is 89898392481.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13590318 + ... + 13591673.

It is an arithmetic number, because the mean of its divisors is an integer number (2324060316).

Almost surely, 2^18429389898 is an apocalyptic number.

18429389898 is an abundant number, since it is smaller than the sum of its proper divisors (18755575158).

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

18429389898 is a wasteful number, since it uses less digits than its factorization.

18429389898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27182109.

The product of its digits is 71663616, while the sum is 69.

The spelling of 18429389898 in words is "eighteen billion, four hundred twenty-nine million, three hundred eighty-nine thousand, eight hundred ninety-eight".