19428071616 has 392 divisors, whose sum is σ = 60865847280. Its totient is φ = 6141671424.

The previous prime is 19428071573. The next prime is 19428071633. The reversal of 19428071616 is 61617082491.

19428071616 is a `hidden beast` number, since 1 + 9 + 4 + 28 + 0 + 7 + 1 + 616 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 112300906 + ... + 112301078.

Almost surely, 2^19428071616 is an apocalyptic number.

19428071616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19428071616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30432923640).

19428071616 is an abundant number, since it is smaller than the sum of its proper divisors (41437775664).

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

19428071616 is an equidigital number, since it uses as much as digits as its factorization.

19428071616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 19428071616 in words is "nineteen billion, four hundred twenty-eight million, seventy-one thousand, six hundred sixteen".