19139027828 has 6 divisors (see below), whose sum is σ = 33493298706. Its totient is φ = 9569513912.

The previous prime is 19139027827. The next prime is 19139027861. The reversal of 19139027828 is 82872093191.

It can be written as a sum of positive squares in only one way, i.e., 15745732324 + 3393295504 = 125482^2 + 58252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19139027827) 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 as a sum of consecutive naturals, namely, 2392378475 + ... + 2392378482.

It is an arithmetic number, because the mean of its divisors is an integer number (5582216451).

Almost surely, 2^19139027828 is an apocalyptic number.

It is an amenable number.

19139027828 is a deficient number, since it is larger than the sum of its proper divisors (14354270878).

19139027828 is a wasteful number, since it uses less digits than its factorization.

19139027828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784756961 (or 4784756959 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 19139027828 in words is "nineteen billion, one hundred thirty-nine million, twenty-seven thousand, eight hundred twenty-eight".