19629948549 has 4 divisors (see below), whose sum is σ = 26173264736. Its totient is φ = 13086632364.

The previous prime is 19629948521. The next prime is 19629948571. The reversal of 19629948549 is 94584992691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19629948549 - 2¹³ = 19629940357 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 19629948549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19629948589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3271658089 + ... + 3271658094.

It is an arithmetic number, because the mean of its divisors is an integer number (6543316184).

Almost surely, 2^19629948549 is an apocalyptic number.

It is an amenable number.

19629948549 is a deficient number, since it is larger than the sum of its proper divisors (6543316187).

19629948549 is an equidigital number, since it uses as much as digits as its factorization.

19629948549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543316186.

The product of its digits is 50388480, while the sum is 66.

The spelling of 19629948549 in words is "nineteen billion, six hundred twenty-nine million, nine hundred forty-eight thousand, five hundred forty-nine".