19893081516256 has 96 divisors (see below), whose sum is σ = 43541668654848. Its totient is φ = 8884439838720.

The previous prime is 19893081516241. The next prime is 19893081516331. The reversal of 19893081516256 is 65261518039891.

It is a super-2 number, since 2×19893081516256² (a number of 27 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 155165076 + ... + 155293228.

It is an arithmetic number, because the mean of its divisors is an integer number (453559048488).

Almost surely, 2^{19893081516256} is an apocalyptic number.

19893081516256 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 19893081516256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21770834327424).

19893081516256 is an abundant number, since it is smaller than the sum of its proper divisors (23648587138592).

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

19893081516256 is a wasteful number, since it uses less digits than its factorization.

19893081516256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140244 (or 140236 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 64.

The spelling of 19893081516256 in words is "nineteen trillion, eight hundred ninety-three billion, eighty-one million, five hundred sixteen thousand, two hundred fifty-six".