20473141657 has 2 divisors, whose sum is σ = 20473141658. Its totient is φ = 20473141656.

The previous prime is 20473141651. The next prime is 20473141681. The reversal of 20473141657 is 75614137402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19908081216 + 565060441 = 141096^2 + 23771^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473141657 - 2¹⁹ = 20472617369 is a prime.

It is not a weakly prime, because it can be changed into another prime (20473141651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236570828 + 10236570829.

It is an arithmetic number, because the mean of its divisors is an integer number (10236570829).

Almost surely, 2^20473141657 is an apocalyptic number.

It is an amenable number.

20473141657 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473141657 is an equidigital number, since it uses as much as digits as its factorization.

20473141657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 20473141657 in words is "twenty billion, four hundred seventy-three million, one hundred forty-one thousand, six hundred fifty-seven".