19742289446 has 32 divisors (see below), whose sum is σ = 32864735232. Its totient is φ = 8819768160.

The previous prime is 19742289409. The next prime is 19742289451. The reversal of 19742289446 is 64498224791.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19742289391 and 19742289400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265940 + ... + 331976.

It is an arithmetic number, because the mean of its divisors is an integer number (1027022976).

Almost surely, 2^19742289446 is an apocalyptic number.

19742289446 is a deficient number, since it is larger than the sum of its proper divisors (13122445786).

19742289446 is a wasteful number, since it uses less digits than its factorization.

19742289446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66284.

The product of its digits is 6967296, while the sum is 56.

The spelling of 19742289446 in words is "nineteen billion, seven hundred forty-two million, two hundred eighty-nine thousand, four hundred forty-six".