19856054473 has 8 divisors (see below), whose sum is σ = 19939439520. Its totient is φ = 19772820480.

The previous prime is 19856054467. The next prime is 19856054489. The reversal of 19856054473 is 37445065891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19856054473 - 2⁵ = 19856054441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19856054473.

It is not an unprimeable number, because it can be changed into a prime (19856051473) 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 7 ways as a sum of consecutive naturals, for example, 229638 + ... + 304048.

It is an arithmetic number, because the mean of its divisors is an integer number (2492429940).

Almost surely, 2^19856054473 is an apocalyptic number.

It is an amenable number.

19856054473 is a deficient number, since it is larger than the sum of its proper divisors (83385047).

19856054473 is an equidigital number, since it uses as much as digits as its factorization.

19856054473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75527.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 19856054473 in words is "nineteen billion, eight hundred fifty-six million, fifty-four thousand, four hundred seventy-three".