20430343768 has 32 divisors (see below), whose sum is σ = 40569039360. Its totient is φ = 9625191840.

The previous prime is 20430343733. The next prime is 20430343771. The reversal of 20430343768 is 86734303402.

It is a self number, because there is not a number n which added to its sum of digits gives 20430343768.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 816288 + ... + 840943.

It is an arithmetic number, because the mean of its divisors is an integer number (1267782480).

Almost surely, 2^20430343768 is an apocalyptic number.

It is an amenable number.

20430343768 is a deficient number, since it is larger than the sum of its proper divisors (20138695592).

20430343768 is a wasteful number, since it uses less digits than its factorization.

20430343768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657327 (or 1657323 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 20430343768 in words is "twenty billion, four hundred thirty million, three hundred forty-three thousand, seven hundred sixty-eight".