20366866719 has 40 divisors (see below), whose sum is σ = 30717505280. Its totient is φ = 13447670544.

The previous prime is 20366866717. The next prime is 20366866733. The reversal of 20366866719 is 91766866302.

It is not a de Polignac number, because 20366866719 - 2¹ = 20366866717 is a prime.

It is a super-2 number, since 2×20366866719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366866717) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 5210964 + ... + 5214870.

It is an arithmetic number, because the mean of its divisors is an integer number (767937632).

Almost surely, 2^20366866719 is an apocalyptic number.

20366866719 is a deficient number, since it is larger than the sum of its proper divisors (10350638561).

20366866719 is a wasteful number, since it uses less digits than its factorization.

20366866719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521 (or 4512 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 20366866719 in words is "twenty billion, three hundred sixty-six million, eight hundred sixty-six thousand, seven hundred nineteen".