20156071711 has 2 divisors, whose sum is σ = 20156071712. Its totient is φ = 20156071710.

The previous prime is 20156071687. The next prime is 20156071721. The reversal of 20156071711 is 11717065102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20156071711 - 2¹⁵ = 20156038943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20156071721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078035855 + 10078035856.

It is an arithmetic number, because the mean of its divisors is an integer number (10078035856).

Almost surely, 2^20156071711 is an apocalyptic number.

20156071711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20156071711 is an equidigital number, since it uses as much as digits as its factorization.

20156071711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 31.

The spelling of 20156071711 in words is "twenty billion, one hundred fifty-six million, seventy-one thousand, seven hundred eleven".