20408392243 has 2 divisors, whose sum is σ = 20408392244. Its totient is φ = 20408392242.

The previous prime is 20408392231. The next prime is 20408392259. The reversal of 20408392243 is 34229380402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20408392243 - 2²⁹ = 19871521331 is a prime.

It is not a weakly prime, because it can be changed into another prime (20408392273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10204196121 + 10204196122.

It is an arithmetic number, because the mean of its divisors is an integer number (10204196122).

Almost surely, 2^20408392243 is an apocalyptic number.

20408392243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20408392243 is an equidigital number, since it uses as much as digits as its factorization.

20408392243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 20408392243 in words is "twenty billion, four hundred eight million, three hundred ninety-two thousand, two hundred forty-three".