18488198890 has 16 divisors (see below), whose sum is σ = 38032866432. Its totient is φ = 6338811024.

The previous prime is 18488198867. The next prime is 18488198947. The reversal of 18488198890 is 9889188481.

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, 132058494 + ... + 132058633.

It is an arithmetic number, because the mean of its divisors is an integer number (2377054152).

Almost surely, 2^18488198890 is an apocalyptic number.

18488198890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18488198890 is an abundant number, since it is smaller than the sum of its proper divisors (19544667542).

18488198890 is a wasteful number, since it uses less digits than its factorization.

18488198890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264117141.

The product of its (nonzero) digits is 10616832, while the sum is 64.

The spelling of 18488198890 in words is "eighteen billion, four hundred eighty-eight million, one hundred ninety-eight thousand, eight hundred ninety".