20326686739 has 2 divisors, whose sum is σ = 20326686740. Its totient is φ = 20326686738.

The previous prime is 20326686713. The next prime is 20326686749. The reversal of 20326686739 is 93768662302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20326686739 is a prime.

It is not a weakly prime, because it can be changed into another prime (20326686749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10163343369 + 10163343370.

It is an arithmetic number, because the mean of its divisors is an integer number (10163343370).

Almost surely, 2^20326686739 is an apocalyptic number.

20326686739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20326686739 is an equidigital number, since it uses as much as digits as its factorization.

20326686739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 20326686739 in words is "twenty billion, three hundred twenty-six million, six hundred eighty-six thousand, seven hundred thirty-nine".