19472561493 has 64 divisors (see below), whose sum is σ = 33233559552. Its totient is φ = 9848033280.

The previous prime is 19472561491. The next prime is 19472561497. The reversal of 19472561493 is 39416527491.

It is a happy number.

It is not a de Polignac number, because 19472561493 - 2¹ = 19472561491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19472561491) 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 63 ways as a sum of consecutive naturals, for example, 2090755 + ... + 2100047.

It is an arithmetic number, because the mean of its divisors is an integer number (519274368).

Almost surely, 2^19472561493 is an apocalyptic number.

It is an amenable number.

19472561493 is a deficient number, since it is larger than the sum of its proper divisors (13760998059).

19472561493 is a wasteful number, since it uses less digits than its factorization.

19472561493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554.

The product of its digits is 1632960, while the sum is 51.

The spelling of 19472561493 in words is "nineteen billion, four hundred seventy-two million, five hundred sixty-one thousand, four hundred ninety-three".