20209139711 has 2 divisors, whose sum is σ = 20209139712. Its totient is φ = 20209139710.

The previous prime is 20209139707. The next prime is 20209139729. The reversal of 20209139711 is 11793190202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20209139711 - 2² = 20209139707 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20209139761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10104569855 + 10104569856.

It is an arithmetic number, because the mean of its divisors is an integer number (10104569856).

Almost surely, 2^20209139711 is an apocalyptic number.

20209139711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20209139711 is an equidigital number, since it uses as much as digits as its factorization.

20209139711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 20209139711 in words is "twenty billion, two hundred nine million, one hundred thirty-nine thousand, seven hundred eleven".