20351655436097 has 2 divisors, whose sum is σ = 20351655436098. Its totient is φ = 20351655436096.

The previous prime is 20351655436069. The next prime is 20351655436109. The reversal of 20351655436097 is 79063455615302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14366214897841 + 5985440538256 = 3790279^2 + 2446516^2 .

It is a cyclic number.

It is not a de Polignac number, because 20351655436097 - 2¹⁶ = 20351655370561 is a prime.

It is not a weakly prime, because it can be changed into another prime (20351655436027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10175827718048 + 10175827718049.

It is an arithmetic number, because the mean of its divisors is an integer number (10175827718049).

Almost surely, 2^{20351655436097} is an apocalyptic number.

It is an amenable number.

20351655436097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20351655436097 is an equidigital number, since it uses as much as digits as its factorization.

20351655436097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412000, while the sum is 56.

The spelling of 20351655436097 in words is "twenty trillion, three hundred fifty-one billion, six hundred fifty-five million, four hundred thirty-six thousand, ninety-seven".