19945701723 has 32 divisors (see below), whose sum is σ = 28001075200. Its totient is φ = 12613255200.

The previous prime is 19945701617. The next prime is 19945701761. The reversal of 19945701723 is 32710754991.

It is not a de Polignac number, because 19945701723 - 2¹⁴ = 19945685339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19945701793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011468 + ... + 1030998.

It is an arithmetic number, because the mean of its divisors is an integer number (875033600).

Almost surely, 2^19945701723 is an apocalyptic number.

19945701723 is a deficient number, since it is larger than the sum of its proper divisors (8055373477).

19945701723 is a wasteful number, since it uses less digits than its factorization.

19945701723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19783.

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 19945701723 in words is "nineteen billion, nine hundred forty-five million, seven hundred one thousand, seven hundred twenty-three".