19528078004 has 24 divisors (see below), whose sum is σ = 35110863648. Its totient is φ = 9496599840.

The previous prime is 19528077991. The next prime is 19528078013. The reversal of 19528078004 is 40087082591.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 397559 + ... + 443969.

It is an arithmetic number, because the mean of its divisors is an integer number (1462952652).

Almost surely, 2^19528078004 is an apocalyptic number.

It is an amenable number.

19528078004 is a deficient number, since it is larger than the sum of its proper divisors (15582785644).

19528078004 is a wasteful number, since it uses less digits than its factorization.

19528078004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49295 (or 49293 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 19528078004 in words is "nineteen billion, five hundred twenty-eight million, seventy-eight thousand, four".