19548793489 has 9 divisors (see below), whose sum is σ = 20439057513. Its totient is φ = 18695769972.

The previous prime is 19548793487. The next prime is 19548793499. The reversal of 19548793489 is 98439784591.

It is a happy number.

The square root of 19548793489 is 139817.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 19548793489 - 2¹ = 19548793487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19548793487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3212752 + ... + 3218830.

Almost surely, 2^19548793489 is an apocalyptic number.

19548793489 is the 139817-th square number.

19548793489 is the 69909-th centered octagonal number.

It is an amenable number.

19548793489 is a deficient number, since it is larger than the sum of its proper divisors (890264024).

19548793489 is an frugal number, since it uses more digits than its factorization.

19548793489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12204 (or 6102 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 67.

The spelling of 19548793489 in words is "nineteen billion, five hundred forty-eight million, seven hundred ninety-three thousand, four hundred eighty-nine".