18447267249 has 24 divisors (see below), whose sum is σ = 27054473472. Its totient is φ = 12109822560.

The previous prime is 18447267233. The next prime is 18447267253. The reversal of 18447267249 is 94276274481.

It is not a de Polignac number, because 18447267249 - 2⁴ = 18447267233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18447267195 and 18447267204.

It is not an unprimeable number, because it can be changed into a prime (18447267229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2155072 + ... + 2163614.

It is an arithmetic number, because the mean of its divisors is an integer number (1127269728).

Almost surely, 2^18447267249 is an apocalyptic number.

It is an amenable number.

18447267249 is a deficient number, since it is larger than the sum of its proper divisors (8607206223).

18447267249 is a wasteful number, since it uses less digits than its factorization.

18447267249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12197 (or 12194 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 18447267249 in words is "eighteen billion, four hundred forty-seven million, two hundred sixty-seven thousand, two hundred forty-nine".