20366373665 has 16 divisors (see below), whose sum is σ = 26723039616. Its totient is φ = 14777683200.

The previous prime is 20366373623. The next prime is 20366373667. The reversal of 20366373665 is 56637366302.

It is not a de Polignac number, because 20366373665 - 2²⁰ = 20365325089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20366373667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403781 + ... + 451410.

It is an arithmetic number, because the mean of its divisors is an integer number (1670189976).

Almost surely, 2^20366373665 is an apocalyptic number.

It is an amenable number.

20366373665 is a deficient number, since it is larger than the sum of its proper divisors (6356665951).

20366373665 is a wasteful number, since it uses less digits than its factorization.

20366373665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855640.

The product of its (nonzero) digits is 2449440, while the sum is 47.

The spelling of 20366373665 in words is "twenty billion, three hundred sixty-six million, three hundred seventy-three thousand, six hundred sixty-five".