20743173 has 24 divisors (see below), whose sum is σ = 32887296. Its totient is φ = 12494400.

The previous prime is 20743103. The next prime is 20743181. The reversal of 20743173 is 37134702.

It is not a de Polignac number, because 20743173 - 2¹³ = 20734981 is a prime.

It is a super-2 number, since 2×20743173² = 860558452215858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20743103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18361 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (1370304).

Almost surely, 2^20743173 is an apocalyptic number.

It is an amenable number.

20743173 is a deficient number, since it is larger than the sum of its proper divisors (12144123).

20743173 is a wasteful number, since it uses less digits than its factorization.

20743173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20743173 is about 4554.4673673219. The cubic root of 20743173 is about 274.7630929376.

Adding to 20743173 its reverse (37134702), we get a palindrome (57877875).

The spelling of 20743173 in words is "twenty million, seven hundred forty-three thousand, one hundred seventy-three".