20168594 has 4 divisors (see below), whose sum is σ = 30252894. Its totient is φ = 10084296.

The previous prime is 20168587. The next prime is 20168609. The reversal of 20168594 is 49586102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49586102 = 2 ⋅24793051.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 5230369 = 3865^2 + 2287^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5042147 + ... + 5042150.

Almost surely, 2^20168594 is an apocalyptic number.

20168594 is a deficient number, since it is larger than the sum of its proper divisors (10084300).

20168594 is a wasteful number, since it uses less digits than its factorization.

20168594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084299.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20168594 is about 4490.9457801225. The cubic root of 20168594 is about 272.2023526676.

The spelling of 20168594 in words is "twenty million, one hundred sixty-eight thousand, five hundred ninety-four".