19481019481 has 48 divisors (see below), whose sum is σ = 25791462144. Its totient is φ = 14374800000.

The previous prime is 19481019479. The next prime is 19481019529. The reversal of 19481019481 is 18491018491.

It is a happy number.

It is not a de Polignac number, because 19481019481 - 2¹ = 19481019479 is a prime.

It is a super-2 number, since 2×19481019481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19481019421) by changing a digit.

It is a Kaprekar number, because its square (379510120019101509361) can be partitioned into two parts whose sum is 19481019481.

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 47 ways as a sum of consecutive naturals, for example, 1962631 + ... + 1972531.

It is an arithmetic number, because the mean of its divisors is an integer number (537322128).

Almost surely, 2^19481019481 is an apocalyptic number.

19481019481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19481019481 is a deficient number, since it is larger than the sum of its proper divisors (6310442663).

19481019481 is a wasteful number, since it uses less digits than its factorization.

19481019481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054 (or 10043 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 46.

The spelling of 19481019481 in words is "nineteen billion, four hundred eighty-one million, nineteen thousand, four hundred eighty-one".