18009362898 has 54 divisors (see below), whose sum is σ = 39927496869. Its totient is φ = 5866664832.

The previous prime is 18009362881. The next prime is 18009362911. The reversal of 18009362898 is 89826390081.

It is a happy number.

18009362898 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 9 + 3 + 628 + 9 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17454901689 + 554461209 = 132117^2 + 23547^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=94893.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 26759490 + ... + 26760162.

Almost surely, 2^18009362898 is an apocalyptic number.

18009362898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18009362898 is an abundant number, since it is smaller than the sum of its proper divisors (21918133971).

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

18009362898 is an frugal number, since it uses more digits than its factorization.

18009362898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 18009362898 in words is "eighteen billion, nine million, three hundred sixty-two thousand, eight hundred ninety-eight".