19548955849 has 4 divisors (see below), whose sum is σ = 20179567360. Its totient is φ = 18918344340.

The previous prime is 19548955807. The next prime is 19548955891. The reversal of 19548955849 is 94855984591.

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 an interprime number because it is at equal distance from previous prime (19548955807) and next prime (19548955891).

It is a cyclic number.

It is not a de Polignac number, because 19548955849 - 2¹⁵ = 19548923081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19548955549) 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, 315305709 + ... + 315305770.

It is an arithmetic number, because the mean of its divisors is an integer number (5044891840).

Almost surely, 2^19548955849 is an apocalyptic number.

It is an amenable number.

19548955849 is a deficient number, since it is larger than the sum of its proper divisors (630611511).

19548955849 is an equidigital number, since it uses as much as digits as its factorization.

19548955849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630611510.

The product of its digits is 93312000, while the sum is 67.

The spelling of 19548955849 in words is "nineteen billion, five hundred forty-eight million, nine hundred fifty-five thousand, eight hundred forty-nine".