20181098 has 16 divisors (see below), whose sum is σ = 34692864. Its totient is φ = 8624880.

The previous prime is 20181079. The next prime is 20181121. The reversal of 20181098 is 89018102.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20181098.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3743 + ... + 7373.

It is an arithmetic number, because the mean of its divisors is an integer number (2168304).

Almost surely, 2^20181098 is an apocalyptic number.

20181098 is a deficient number, since it is larger than the sum of its proper divisors (14511766).

20181098 is a wasteful number, since it uses less digits than its factorization.

20181098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 20181098 is about 4492.3376987934. The cubic root of 20181098 is about 272.2585938228.

The spelling of 20181098 in words is "twenty million, one hundred eighty-one thousand, ninety-eight".