20673158 has 32 divisors (see below), whose sum is σ = 35212320. Its totient is φ = 9020160.

The previous prime is 20673157. The next prime is 20673181. The reversal of 20673158 is 85137602.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673151) 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 15 ways as a sum of consecutive naturals, for example, 88610 + ... + 88842.

It is an arithmetic number, because the mean of its divisors is an integer number (1100385).

Almost surely, 2^20673158 is an apocalyptic number.

20673158 is a deficient number, since it is larger than the sum of its proper divisors (14539162).

20673158 is a wasteful number, since it uses less digits than its factorization.

20673158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20673158 is about 4546.7744610878. The cubic root of 20673158 is about 274.4536060048.

It can be divided in two parts, 2067 and 3158, that added together give a palindrome (5225).

The spelling of 20673158 in words is "twenty million, six hundred seventy-three thousand, one hundred fifty-eight".