20408271739 has 2 divisors, whose sum is σ = 20408271740. Its totient is φ = 20408271738.

The previous prime is 20408271713. The next prime is 20408271769. The reversal of 20408271739 is 93717280402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20408271739 - 2⁹ = 20408271227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20408271695 and 20408271704.

It is not a weakly prime, because it can be changed into another prime (20408271769) 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, 10204135869 + 10204135870.

It is an arithmetic number, because the mean of its divisors is an integer number (10204135870).

Almost surely, 2^20408271739 is an apocalyptic number.

20408271739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20408271739 is an equidigital number, since it uses as much as digits as its factorization.

20408271739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 20408271739 in words is "twenty billion, four hundred eight million, two hundred seventy-one thousand, seven hundred thirty-nine".