20171098 has 8 divisors (see below), whose sum is σ = 30994740. Its totient is φ = 9839520.

The previous prime is 20171089. The next prime is 20171101. The reversal of 20171098 is 89017102.

It can be written as a sum of positive squares in 2 ways, for example, as 17665209 + 2505889 = 4203^2 + 1583^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 122913 + ... + 123076.

Almost surely, 2^20171098 is an apocalyptic number.

20171098 is a deficient number, since it is larger than the sum of its proper divisors (10823642).

20171098 is a wasteful number, since it uses less digits than its factorization.

20171098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246032.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 20171098 is about 4491.2245546176. The cubic root of 20171098 is about 272.2136171528.

The spelling of 20171098 in words is "twenty million, one hundred seventy-one thousand, ninety-eight".