19879925433481 has 9 divisors (see below), whose sum is σ = 19910554661511. Its totient is φ = 19849343271912.

The previous prime is 19879925433469. The next prime is 19879925433493. The reversal of 19879925433481 is 18433452997891.

The square root of 19879925433481 is 4458691.

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

It is an interprime number because it is at equal distance from previous prime (19879925433469) and next prime (19879925433493).

It can be written as a sum of positive squares in only one way, i.e., 19249673628025 + 630251805456 = 4387445^2 + 793884^2 .

It is not a de Polignac number, because 19879925433481 - 2³⁵ = 19845565695113 is a prime.

It is a super-2 number, since 2×19879925433481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19879928433481) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 3241465291 + ... + 3241471423.

It is an arithmetic number, because the mean of its divisors is an integer number (2212283851279).

Almost surely, 2^{19879925433481} is an apocalyptic number.

19879925433481 is the 4458691-st square number.

19879925433481 is the 2229346-th centered octagonal number.

It is an amenable number.

19879925433481 is a deficient number, since it is larger than the sum of its proper divisors (30629228030).

19879925433481 is an frugal number, since it uses more digits than its factorization.

19879925433481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13720 (or 6860 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 73.

The spelling of 19879925433481 in words is "nineteen trillion, eight hundred seventy-nine billion, nine hundred twenty-five million, four hundred thirty-three thousand, four hundred eighty-one".