20346665446665 has 12 divisors (see below), whose sum is σ = 35267553440964. Its totient is φ = 10851554904864.

The previous prime is 20346665446651. The next prime is 20346665446769. The reversal of 20346665446665 is 56664456664302.

It can be written as a sum of positive squares in 2 ways, for example, as 12082374392841 + 8264291053824 = 3475971^2 + 2874768^2 .

It is not a de Polignac number, because 20346665446665 - 2²⁸ = 20346397011209 is a prime.

It is a super-2 number, since 2×20346665446665² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226074060474 + ... + 226074060563.

It is an arithmetic number, because the mean of its divisors is an integer number (2938962786747).

Almost surely, 2^{20346665446665} is an apocalyptic number.

It is an amenable number.

20346665446665 is a deficient number, since it is larger than the sum of its proper divisors (14920887994299).

20346665446665 is a wasteful number, since it uses less digits than its factorization.

20346665446665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452148121048 (or 452148121045 counting only the distinct ones).

The product of its (nonzero) digits is 447897600, while the sum is 63.

The spelling of 20346665446665 in words is "twenty trillion, three hundred forty-six billion, six hundred sixty-five million, four hundred forty-six thousand, six hundred sixty-five".