20109927270397 has 2 divisors, whose sum is σ = 20109927270398. Its totient is φ = 20109927270396.

The previous prime is 20109927270373. The next prime is 20109927270431. The reversal of 20109927270397 is 79307272990102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10112024763481 + 9997902506916 = 3179941^2 + 3161946^2 .

It is a cyclic number.

It is not a de Polignac number, because 20109927270397 - 2¹⁵ = 20109927237629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20109927070397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054963635198 + 10054963635199.

It is an arithmetic number, because the mean of its divisors is an integer number (10054963635199).

Almost surely, 2^{20109927270397} is an apocalyptic number.

It is an amenable number.

20109927270397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109927270397 is an equidigital number, since it uses as much as digits as its factorization.

20109927270397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6001128, while the sum is 58.

The spelling of 20109927270397 in words is "twenty trillion, one hundred nine billion, nine hundred twenty-seven million, two hundred seventy thousand, three hundred ninety-seven".