19742706873 has 12 divisors (see below), whose sum is σ = 28519680228. Its totient is φ = 13160679840.

The previous prime is 19742706869. The next prime is 19742706881. The reversal of 19742706873 is 37860724791.

19742706873 is a `hidden beast` number, since 1 + 97 + 427 + 0 + 68 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13744514169 + 5998192704 = 117237^2 + 77448^2 .

It is not a de Polignac number, because 19742706873 - 2² = 19742706869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19742706073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25411 + ... + 200327.

It is an arithmetic number, because the mean of its divisors is an integer number (2376640019).

Almost surely, 2^19742706873 is an apocalyptic number.

It is an amenable number.

19742706873 is a deficient number, since it is larger than the sum of its proper divisors (8776973355).

19742706873 is a wasteful number, since it uses less digits than its factorization.

19742706873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187464 (or 187461 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

It can be divided in two parts, 19742 and 706873, that added together give a triangular number (726615 = T₁₂₀₅).

The spelling of 19742706873 in words is "nineteen billion, seven hundred forty-two million, seven hundred six thousand, eight hundred seventy-three".