20704043 has 2 divisors, whose sum is σ = 20704044. Its totient is φ = 20704042.

The previous prime is 20704037. The next prime is 20704081. The reversal of 20704043 is 34040702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20704043 - 2¹² = 20699947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20704093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10352021 + 10352022.

It is an arithmetic number, because the mean of its divisors is an integer number (10352022).

Almost surely, 2^20704043 is an apocalyptic number.

20704043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20704043 is an equidigital number, since it uses as much as digits as its factorization.

20704043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20704043 is about 4550.1695572803. The cubic root of 20704043 is about 274.5902128055.

Adding to 20704043 its reverse (34040702), we get a palindrome (54744745).

The spelling of 20704043 in words is "twenty million, seven hundred four thousand, forty-three".