18448432147 has 16 divisors (see below), whose sum is σ = 20572272000. Its totient is φ = 16440935040.

The previous prime is 18448432141. The next prime is 18448432153. The reversal of 18448432147 is 74123484481.

It is an interprime number because it is at equal distance from previous prime (18448432141) and next prime (18448432153).

It is a cyclic number.

It is not a de Polignac number, because 18448432147 - 2¹⁵ = 18448399379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18448432097 and 18448432106.

It is not an unprimeable number, because it can be changed into a prime (18448432141) 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 15 ways as a sum of consecutive naturals, for example, 664372 + ... + 691582.

It is an arithmetic number, because the mean of its divisors is an integer number (1285767000).

Almost surely, 2^18448432147 is an apocalyptic number.

18448432147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18448432147 is a deficient number, since it is larger than the sum of its proper divisors (2123839853).

18448432147 is a wasteful number, since it uses less digits than its factorization.

18448432147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29346.

The product of its digits is 688128, while the sum is 46.

The spelling of 18448432147 in words is "eighteen billion, four hundred forty-eight million, four hundred thirty-two thousand, one hundred forty-seven".