19356409828 has 72 divisors (see below), whose sum is σ = 43281604800. Its totient is φ = 7517264832.

The previous prime is 19356409823. The next prime is 19356409843. The reversal of 19356409828 is 82890465391.

It is not an unprimeable number, because it can be changed into a prime (19356409823) 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, 27343 + ... + 198646.

It is an arithmetic number, because the mean of its divisors is an integer number (601133400).

Almost surely, 2^19356409828 is an apocalyptic number.

It is an amenable number.

19356409828 is an abundant number, since it is smaller than the sum of its proper divisors (23925194972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19356409828 is a wasteful number, since it uses less digits than its factorization.

19356409828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226049 (or 226040 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 19356409828 in words is "nineteen billion, three hundred fifty-six million, four hundred nine thousand, eight hundred twenty-eight".