18478248730 has 8 divisors (see below), whose sum is σ = 33260847732. Its totient is φ = 7391299488.

The previous prime is 18478248721. The next prime is 18478248781. The reversal of 18478248730 is 3784287481.

It can be written as a sum of positive squares in 2 ways, for example, as 18024942049 + 453306681 = 134257^2 + 21291^2 .

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

It is a super-2 number, since 2×18478248730² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 923912427 + ... + 923912446.

Almost surely, 2^18478248730 is an apocalyptic number.

18478248730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18478248730 is a deficient number, since it is larger than the sum of its proper divisors (14782599002).

18478248730 is a wasteful number, since it uses less digits than its factorization.

18478248730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847824880.

The product of its (nonzero) digits is 2408448, while the sum is 52.

The spelling of 18478248730 in words is "eighteen billion, four hundred seventy-eight million, two hundred forty-eight thousand, seven hundred thirty".