20164087 has 8 divisors (see below), whose sum is σ = 20799072. Its totient is φ = 19536000.

The previous prime is 20164063. The next prime is 20164093. The reversal of 20164087 is 78046102.

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

It is a cyclic number.

It is not a de Polignac number, because 20164087 - 2¹⁹ = 19639799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20264087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4563 + ... + 7819.

It is an arithmetic number, because the mean of its divisors is an integer number (2599884).

Almost surely, 2^20164087 is an apocalyptic number.

20164087 is a deficient number, since it is larger than the sum of its proper divisors (634985).

20164087 is a wasteful number, since it uses less digits than its factorization.

20164087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20164087 is about 4490.4439646877. The cubic root of 20164087 is about 272.1820751444.

The spelling of 20164087 in words is "twenty million, one hundred sixty-four thousand, eighty-seven".