20170018 has 16 divisors (see below), whose sum is σ = 33087456. Its totient is φ = 9145440.

The previous prime is 20170009. The next prime is 20170019. The reversal of 20170018 is 81007102.

It is a super-2 number, since 2×20170018² = 813659252240648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20169977 and 20170004.

It is not an unprimeable number, because it can be changed into a prime (20170019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10630 + ... + 12382.

It is an arithmetic number, because the mean of its divisors is an integer number (2067966).

Almost surely, 2^20170018 is an apocalyptic number.

20170018 is a deficient number, since it is larger than the sum of its proper divisors (12917438).

20170018 is a wasteful number, since it uses less digits than its factorization.

20170018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 20170018 is about 4491.1043185390. The cubic root of 20170018 is about 272.2087587831.

The spelling of 20170018 in words is "twenty million, one hundred seventy thousand, eighteen".