18470381481 has 20 divisors (see below), whose sum is σ = 27595905172. Its totient is φ = 12311647488.

The previous prime is 18470381471. The next prime is 18470381497. The reversal of 18470381481 is 18418307481.

18470381481 is a `hidden beast` number, since 1 + 8 + 470 + 38 + 148 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1442480400 + 17027901081 = 37980^2 + 130491^2 .

It is not a de Polignac number, because 18470381481 - 2²² = 18466187177 is a prime.

It is a super-2 number, since 2×18470381481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18470381471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 653025 + ... + 680721.

Almost surely, 2^18470381481 is an apocalyptic number.

It is an amenable number.

18470381481 is a deficient number, since it is larger than the sum of its proper divisors (9125523691).

18470381481 is an equidigital number, since it uses as much as digits as its factorization.

18470381481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35942 (or 35933 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 18470381481 in words is "eighteen billion, four hundred seventy million, three hundred eighty-one thousand, four hundred eighty-one".