20686343404 has 12 divisors (see below), whose sum is σ = 38106422200. Its totient is φ = 9798794208.

The previous prime is 20686343371. The next prime is 20686343407. The reversal of 20686343404 is 40434368602.

It is not an unprimeable number, because it can be changed into a prime (20686343407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136094289 + ... + 136094440.

Almost surely, 2^20686343404 is an apocalyptic number.

It is an amenable number.

20686343404 is a deficient number, since it is larger than the sum of its proper divisors (17420078796).

20686343404 is a wasteful number, since it uses less digits than its factorization.

20686343404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272188752 (or 272188750 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 20686343404 in words is "twenty billion, six hundred eighty-six million, three hundred forty-three thousand, four hundred four".