20454375317 has 2 divisors, whose sum is σ = 20454375318. Its totient is φ = 20454375316.

The previous prime is 20454375307. The next prime is 20454375397. The reversal of 20454375317 is 71357345402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20098449361 + 355925956 = 141769^2 + 18866^2 .

It is a cyclic number.

It is not a de Polignac number, because 20454375317 - 2⁴ = 20454375301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20454375307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227187658 + 10227187659.

It is an arithmetic number, because the mean of its divisors is an integer number (10227187659).

Almost surely, 2^20454375317 is an apocalyptic number.

It is an amenable number.

20454375317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454375317 is an equidigital number, since it uses as much as digits as its factorization.

20454375317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 41.

The spelling of 20454375317 in words is "twenty billion, four hundred fifty-four million, three hundred seventy-five thousand, three hundred seventeen".