20470169497 has 2 divisors, whose sum is σ = 20470169498. Its totient is φ = 20470169496.

The previous prime is 20470169417. The next prime is 20470169617. The reversal of 20470169497 is 79496107402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20410122496 + 60047001 = 142864^2 + 7749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20470169497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20470169497.

It is not a weakly prime, because it can be changed into another prime (20470169407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10235084748 + 10235084749.

It is an arithmetic number, because the mean of its divisors is an integer number (10235084749).

Almost surely, 2^20470169497 is an apocalyptic number.

It is an amenable number.

20470169497 is a deficient number, since it is larger than the sum of its proper divisors (1).

20470169497 is an equidigital number, since it uses as much as digits as its factorization.

20470169497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 20470169497 in words is "twenty billion, four hundred seventy million, one hundred sixty-nine thousand, four hundred ninety-seven".