18271484847 has 200 divisors, whose sum is σ = 35918530560. Its totient is φ = 9056124000.

The previous prime is 18271484807. The next prime is 18271484873. The reversal of 18271484847 is 74848417281.

18271484847 is a `hidden beast` number, since 1 + 82 + 7 + 1 + 484 + 84 + 7 = 666.

It is not a de Polignac number, because 18271484847 - 2¹⁴ = 18271468463 is a prime.

It is a super-2 number, since 2×18271484847² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18271484793 and 18271484802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18271484807) by changing a digit.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 257344822 + ... + 257344892.

Almost surely, 2^18271484847 is an apocalyptic number.

18271484847 is a deficient number, since it is larger than the sum of its proper divisors (17647045713).

18271484847 is an frugal number, since it uses more digits than its factorization.

18271484847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 123 counting only the distinct ones).

The product of its digits is 3211264, while the sum is 54.

The spelling of 18271484847 in words is "eighteen billion, two hundred seventy-one million, four hundred eighty-four thousand, eight hundred forty-seven".