20170994 has 8 divisors (see below), whose sum is σ = 31074348. Its totient is φ = 9812880.

The previous prime is 20170963. The next prime is 20171017. The reversal of 20170994 is 49907102.

It can be written as a sum of positive squares in 2 ways, for example, as 18447025 + 1723969 = 4295^2 + 1313^2 .

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

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 20170994.

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, 136217 + ... + 136364.

Almost surely, 2^20170994 is an apocalyptic number.

20170994 is a deficient number, since it is larger than the sum of its proper divisors (10903354).

20170994 is a wasteful number, since it uses less digits than its factorization.

20170994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272620.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 20170994 is about 4491.2129764686. The cubic root of 20170994 is about 272.2131493174.

The spelling of 20170994 in words is "twenty million, one hundred seventy thousand, nine hundred ninety-four".