19530078816 has 48 divisors (see below), whose sum is σ = 52652046384. Its totient is φ = 6334078464.

The previous prime is 19530078811. The next prime is 19530078863. The reversal of 19530078816 is 61887003591.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19530078811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2745615 + ... + 2752718.

It is an arithmetic number, because the mean of its divisors is an integer number (1096917633).

Almost surely, 2^19530078816 is an apocalyptic number.

19530078816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19530078816 is an abundant number, since it is smaller than the sum of its proper divisors (33121967568).

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

19530078816 is a wasteful number, since it uses less digits than its factorization.

19530078816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5498383 (or 5498375 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The spelling of 19530078816 in words is "nineteen billion, five hundred thirty million, seventy-eight thousand, eight hundred sixteen".