20666320207435 has 32 divisors (see below), whose sum is σ = 30015268060032. Its totient is φ = 13335063920640.

The previous prime is 20666320207399. The next prime is 20666320207447. The reversal of 20666320207435 is 53470202366602.

It is not a de Polignac number, because 20666320207435 - 2⁹ = 20666320206923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146322 + ... + 6430711.

It is an arithmetic number, because the mean of its divisors is an integer number (937977126876).

Almost surely, 2^{20666320207435} is an apocalyptic number.

20666320207435 is a deficient number, since it is larger than the sum of its proper divisors (9348947852597).

20666320207435 is a wasteful number, since it uses less digits than its factorization.

20666320207435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582343.

The product of its (nonzero) digits is 2177280, while the sum is 46.

The spelling of 20666320207435 in words is "twenty trillion, six hundred sixty-six billion, three hundred twenty million, two hundred seven thousand, four hundred thirty-five".