19009896481156 has 81 divisors (see below), whose sum is σ = 40082903966469. Its totient is φ = 7865431575456.

The previous prime is 19009896481139. The next prime is 19009896481159. The reversal of 19009896481156 is 65118469890091.

It is a happy number.

The square root of 19009896481156 is 4360034.

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

It can be written as a sum of positive squares in only one way, i.e., 9968328594756 + 9041567886400 = 3157266^2 + 3006920^2 .

It is a super-2 number, since 2×19009896481156² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19009896481091 and 19009896481100.

It is not an unprimeable number, because it can be changed into a prime (19009896481159) 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 26 ways as a sum of consecutive naturals, for example, 1770168435 + ... + 1770179173.

Almost surely, 2^{19009896481156} is an apocalyptic number.

19009896481156 is the 4360034-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19009896481156

19009896481156 is an abundant number, since it is smaller than the sum of its proper divisors (21073007485313).

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

19009896481156 is an frugal number, since it uses more digits than its factorization.

19009896481156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21554 (or 10777 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 67.

The spelling of 19009896481156 in words is "nineteen trillion, nine billion, eight hundred ninety-six million, four hundred eighty-one thousand, one hundred fifty-six".