18448435749 has 8 divisors (see below), whose sum is σ = 24598795680. Its totient is φ = 12298516496.

The previous prime is 18448435711. The next prime is 18448435783. The reversal of 18448435749 is 94753484481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18448435749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448435549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4594 + ... + 192140.

It is an arithmetic number, because the mean of its divisors is an integer number (3074849460).

Almost surely, 2^18448435749 is an apocalyptic number.

It is an amenable number.

18448435749 is a deficient number, since it is larger than the sum of its proper divisors (6150359931).

18448435749 is a wasteful number, since it uses less digits than its factorization.

18448435749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220339.

The product of its digits is 15482880, while the sum is 57.

The spelling of 18448435749 in words is "eighteen billion, four hundred forty-eight million, four hundred thirty-five thousand, seven hundred forty-nine".