20412430243 has 2 divisors, whose sum is σ = 20412430244. Its totient is φ = 20412430242.

The previous prime is 20412430231. The next prime is 20412430249. The reversal of 20412430243 is 34203421402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20412430243 - 2⁹ = 20412429731 is a prime.

It is not a weakly prime, because it can be changed into another prime (20412430249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206215121 + 10206215122.

It is an arithmetic number, because the mean of its divisors is an integer number (10206215122).

Almost surely, 2^20412430243 is an apocalyptic number.

20412430243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412430243 is an equidigital number, since it uses as much as digits as its factorization.

20412430243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20412430243 its reverse (34203421402), we get a palindrome (54615851645).

The spelling of 20412430243 in words is "twenty billion, four hundred twelve million, four hundred thirty thousand, two hundred forty-three".