20415766923297 has 6 divisors (see below), whose sum is σ = 29489441111442. Its totient is φ = 13610511282192.

The previous prime is 20415766923239. The next prime is 20415766923313. The reversal of 20415766923297 is 79232966751402.

20415766923297 is a `hidden beast` number, since 2 + 0 + 415 + 76 + 69 + 2 + 3 + 2 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18915923371536 + 1499843551761 = 4349244^2 + 1224681^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20415766923297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20415766922297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1134209273508 + ... + 1134209273525.

It is an arithmetic number, because the mean of its divisors is an integer number (4914906851907).

Almost surely, 2^{20415766923297} is an apocalyptic number.

It is an amenable number.

20415766923297 is a deficient number, since it is larger than the sum of its proper divisors (9073674188145).

20415766923297 is a wasteful number, since it uses less digits than its factorization.

20415766923297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268418547039 (or 2268418547036 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 63.

The spelling of 20415766923297 in words is "twenty trillion, four hundred fifteen billion, seven hundred sixty-six million, nine hundred twenty-three thousand, two hundred ninety-seven".