20169319 has 4 divisors (see below), whose sum is σ = 20297944. Its totient is φ = 20040696.

The previous prime is 20169311. The next prime is 20169323. The reversal of 20169319 is 91396102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20169319 - 2³ = 20169311 is a prime.

It is a super-2 number, since 2×20169319² = 813602857847522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20169311) by changing a digit.

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, 64077 + ... + 64390.

It is an arithmetic number, because the mean of its divisors is an integer number (5074486).

Almost surely, 2^20169319 is an apocalyptic number.

20169319 is a deficient number, since it is larger than the sum of its proper divisors (128625).

20169319 is a wasteful number, since it uses less digits than its factorization.

20169319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128624.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 20169319 is about 4491.0264973612. The cubic root of 20169319 is about 272.2056142459.

The spelling of 20169319 in words is "twenty million, one hundred sixty-nine thousand, three hundred nineteen".