20956592785099 has 2 divisors, whose sum is σ = 20956592785100. Its totient is φ = 20956592785098.

The previous prime is 20956592785057. The next prime is 20956592785159. The reversal of 20956592785099 is 99058729565902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20956592785099 - 2¹⁹ = 20956592260811 is a prime.

It is not a weakly prime, because it can be changed into another prime (20956592725099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10478296392549 + 10478296392550.

It is an arithmetic number, because the mean of its divisors is an integer number (10478296392550).

Almost surely, 2^{20956592785099} is an apocalyptic number.

20956592785099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20956592785099 is an equidigital number, since it uses as much as digits as its factorization.

20956592785099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248000, while the sum is 76.

The spelling of 20956592785099 in words is "twenty trillion, nine hundred fifty-six billion, five hundred ninety-two million, seven hundred eighty-five thousand, ninety-nine".