19441251449 has 32 divisors (see below), whose sum is σ = 20727252000. Its totient is φ = 18207866880.

The previous prime is 19441251419. The next prime is 19441251457. The reversal of 19441251449 is 94415214491.

It can be written as a sum of positive squares in 16 ways, for example, as 12988021225 + 6453230224 = 113965^2 + 80332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19441251449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19441251419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43298777 + ... + 43299225.

It is an arithmetic number, because the mean of its divisors is an integer number (647726625).

Almost surely, 2^19441251449 is an apocalyptic number.

It is an amenable number.

19441251449 is a deficient number, since it is larger than the sum of its proper divisors (1286000551).

19441251449 is a wasteful number, since it uses less digits than its factorization.

19441251449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845.

The product of its digits is 207360, while the sum is 44.

The spelling of 19441251449 in words is "nineteen billion, four hundred forty-one million, two hundred fifty-one thousand, four hundred forty-nine".