20430339928 has 16 divisors (see below), whose sum is σ = 38334930480. Its totient is φ = 10207691808.

The previous prime is 20430339871. The next prime is 20430339929. The reversal of 20430339928 is 82993303402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430339929) 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 3 ways as a sum of consecutive naturals, for example, 923151 + ... + 945022.

It is an arithmetic number, because the mean of its divisors is an integer number (2395933155).

Almost surely, 2^20430339928 is an apocalyptic number.

It is an amenable number.

20430339928 is a deficient number, since it is larger than the sum of its proper divisors (17904590552).

20430339928 is a wasteful number, since it uses less digits than its factorization.

20430339928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869546 (or 1869542 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 20430339928 in words is "twenty billion, four hundred thirty million, three hundred thirty-nine thousand, nine hundred twenty-eight".