18928839357 has 24 divisors (see below), whose sum is σ = 28831420800. Its totient is φ = 11933984448.

The previous prime is 18928839353. The next prime is 18928839379. The reversal of 18928839357 is 75393882981.

18928839357 is a `hidden beast` number, since 189 + 28 + 83 + 9 + 357 = 666.

It is not a de Polignac number, because 18928839357 - 2² = 18928839353 is a prime.

It is a super-2 number, since 2×18928839357² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18928839294 and 18928839303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18928839353) 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 23 ways as a sum of consecutive naturals, for example, 28 + ... + 194570.

It is an arithmetic number, because the mean of its divisors is an integer number (1201309200).

Almost surely, 2^18928839357 is an apocalyptic number.

It is an amenable number.

18928839357 is a deficient number, since it is larger than the sum of its proper divisors (9902581443).

18928839357 is a wasteful number, since it uses less digits than its factorization.

18928839357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195137 (or 195134 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 18928839357 in words is "eighteen billion, nine hundred twenty-eight million, eight hundred thirty-nine thousand, three hundred fifty-seven".