19968233481 has 45 divisors (see below), whose sum is σ = 34714621821. Its totient is φ = 11405332008.

The previous prime is 19968233459. The next prime is 19968233531. The reversal of 19968233481 is 18433286991.

The square root of 19968233481 is 141309.

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

It is not a de Polignac number, because 19968233481 - 2¹⁵ = 19968200713 is a prime.

It is a super-2 number, since 2×19968233481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19968333481) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 8901346 + ... + 8903588.

Almost surely, 2^19968233481 is an apocalyptic number.

19968233481 is the 141309-th square number.

19968233481 is the 70655-th centered octagonal number.

It is an amenable number.

19968233481 is a deficient number, since it is larger than the sum of its proper divisors (14746388340).

19968233481 is an frugal number, since it uses more digits than its factorization.

19968233481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 2253 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 19968233481 in words is "nineteen billion, nine hundred sixty-eight million, two hundred thirty-three thousand, four hundred eighty-one".