20345743 has 8 divisors (see below), whose sum is σ = 22416336. Its totient is φ = 18312000.

The previous prime is 20345723. The next prime is 20345747. The reversal of 20345743 is 34754302.

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 20345743 - 2⁹ = 20345231 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 (20345747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8046 + ... + 10267.

It is an arithmetic number, because the mean of its divisors is an integer number (2802042).

Almost surely, 2^20345743 is an apocalyptic number.

20345743 is a deficient number, since it is larger than the sum of its proper divisors (2070593).

20345743 is a wasteful number, since it uses less digits than its factorization.

20345743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 20345743 is about 4510.6255663710. The cubic root of 20345743 is about 272.9969854802.

It can be divided in two parts, 2034 and 5743, that added together give a palindrome (7777).

The spelling of 20345743 in words is "twenty million, three hundred forty-five thousand, seven hundred forty-three".