20605611293 has 2 divisors, whose sum is σ = 20605611294. Its totient is φ = 20605611292.

The previous prime is 20605611227. The next prime is 20605611329. The reversal of 20605611293 is 39211650602.

Together with next prime (20605611329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20591676004 + 13935289 = 143498^2 + 3733^2 .

It is a cyclic number.

It is not a de Polignac number, because 20605611293 - 2²⁶ = 20538502429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20605610293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10302805646 + 10302805647.

It is an arithmetic number, because the mean of its divisors is an integer number (10302805647).

Almost surely, 2^20605611293 is an apocalyptic number.

It is an amenable number.

20605611293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20605611293 is an equidigital number, since it uses as much as digits as its factorization.

20605611293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 20605611293 in words is "twenty billion, six hundred five million, six hundred eleven thousand, two hundred ninety-three".