18816473488 has 40 divisors (see below), whose sum is σ = 36723649536. Its totient is φ = 9339609600.

The previous prime is 18816473449. The next prime is 18816473491. The reversal of 18816473488 is 88437461881.

It is a super-2 number, since 2×18816473488² (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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531048 + ... + 1543288.

Almost surely, 2^18816473488 is an apocalyptic number.

It is an amenable number.

18816473488 is a deficient number, since it is larger than the sum of its proper divisors (17907176048).

18816473488 is a wasteful number, since it uses less digits than its factorization.

18816473488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12943 (or 12937 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 58.

The spelling of 18816473488 in words is "eighteen billion, eight hundred sixteen million, four hundred seventy-three thousand, four hundred eighty-eight".