20180743 has 6 divisors (see below), whose sum is σ = 22182272. Its totient is φ = 18346020.

The previous prime is 20180737. The next prime is 20180747. The reversal of 20180743 is 34708102.

It is not a de Polignac number, because 20180743 - 2⁹ = 20180231 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 (20180747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83271 + ... + 83512.

Almost surely, 2^20180743 is an apocalyptic number.

20180743 is a deficient number, since it is larger than the sum of its proper divisors (2001529).

20180743 is a wasteful number, since it uses less digits than its factorization.

20180743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166805 (or 166794 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20180743 is about 4492.2981868972. The cubic root of 20180743 is about 272.2569974054.

Adding to 20180743 its reverse (34708102), we get a palindrome (54888845).

The spelling of 20180743 in words is "twenty million, one hundred eighty thousand, seven hundred forty-three".