20357573017 has 2 divisors, whose sum is σ = 20357573018. Its totient is φ = 20357573016.

The previous prime is 20357572957. The next prime is 20357573023. The reversal of 20357573017 is 71037575302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10762195081 + 9595377936 = 103741^2 + 97956^2 .

It is a cyclic number.

It is not a de Polignac number, because 20357573017 - 2⁷ = 20357572889 is a prime.

It is not a weakly prime, because it can be changed into another prime (20357573057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178786508 + 10178786509.

It is an arithmetic number, because the mean of its divisors is an integer number (10178786509).

Almost surely, 2^20357573017 is an apocalyptic number.

It is an amenable number.

20357573017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20357573017 is an equidigital number, since it uses as much as digits as its factorization.

20357573017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 154350, while the sum is 40.

The spelling of 20357573017 in words is "twenty billion, three hundred fifty-seven million, five hundred seventy-three thousand, seventeen".