19094817856 has 63 divisors (see below), whose sum is σ = 39663167943. Its totient is φ = 9120144000.

The previous prime is 19094817853. The next prime is 19094817869. The reversal of 19094817856 is 65871849091.

The square root of 19094817856 is 138184.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×19094817856² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19094817856.

It is not an unprimeable number, because it can be changed into a prime (19094817851) 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 8 ways as a sum of consecutive naturals, for example, 25425481 + ... + 25426231.

Almost surely, 2^19094817856 is an apocalyptic number.

19094817856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19094817856 is the 138184-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19094817856

19094817856 is an abundant number, since it is smaller than the sum of its proper divisors (20568350087).

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

19094817856 is an frugal number, since it uses more digits than its factorization.

19094817856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 19094817856 in words is "nineteen billion, ninety-four million, eight hundred seventeen thousand, eight hundred fifty-six".