20675780793 has 20 divisors (see below), whose sum is σ = 32228917248. Its totient is φ = 13184554680.

The previous prime is 20675780779. The next prime is 20675780821. The reversal of 20675780793 is 39708757602.

20675780793 is a `hidden beast` number, since 2 + 0 + 67 + 578 + 0 + 7 + 9 + 3 = 666.

It is not a de Polignac number, because 20675780793 - 2⁵ = 20675780761 is a prime.

It is a super-2 number, since 2×20675780793² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20675780093) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5547193 + ... + 5550918.

Almost surely, 2^20675780793 is an apocalyptic number.

20675780793 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20675780793 is a deficient number, since it is larger than the sum of its proper divisors (11553136455).

20675780793 is a wasteful number, since it uses less digits than its factorization.

20675780793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11098146 (or 11098137 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The spelling of 20675780793 in words is "twenty billion, six hundred seventy-five million, seven hundred eighty thousand, seven hundred ninety-three".