19743341121 has 27 divisors (see below), whose sum is σ = 33179144193. Its totient is φ = 11280223080.

The previous prime is 19743341083. The next prime is 19743341131. The reversal of 19743341121 is 12114334791.

It is a happy number.

The square root of 19743341121 is 140511.

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

19743341121 is a `hidden beast` number, since 197 + 4 + 3 + 341 + 121 = 666.

It is not a de Polignac number, because 19743341121 - 2⁷ = 19743340993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19743341131) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2947386 + ... + 2954076.

Almost surely, 2^19743341121 is an apocalyptic number.

19743341121 is the 140511-st square number.

19743341121 is the 70256-th centered octagonal number.

It is an amenable number.

19743341121 is a deficient number, since it is larger than the sum of its proper divisors (13435803072).

19743341121 is an frugal number, since it uses more digits than its factorization.

19743341121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13402 (or 6701 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

Multiplying 19743341121 by its sum of digits (36), we get a square (710760280356 = 843066²).

The spelling of 19743341121 in words is "nineteen billion, seven hundred forty-three million, three hundred forty-one thousand, one hundred twenty-one".