20345043 has 8 divisors (see below), whose sum is σ = 27453888. Its totient is φ = 13399784.

The previous prime is 20345033. The next prime is 20345051. The reversal of 20345043 is 34054302.

It is a happy number.

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 20345043 - 2⁵ = 20345011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20345023) 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 7 ways as a sum of consecutive naturals, for example, 40605 + ... + 41102.

It is an arithmetic number, because the mean of its divisors is an integer number (3431736).

Almost surely, 2^20345043 is an apocalyptic number.

20345043 is a deficient number, since it is larger than the sum of its proper divisors (7108845).

20345043 is an equidigital number, since it uses as much as digits as its factorization.

20345043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81793.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20345043 is about 4510.5479711450. The cubic root of 20345043 is about 272.9938546028.

Adding to 20345043 its reverse (34054302), we get a palindrome (54399345).

The spelling of 20345043 in words is "twenty million, three hundred forty-five thousand, forty-three".