18068481440 has 48 divisors (see below), whose sum is σ = 44063792640. Its totient is φ = 6994248960.

The previous prime is 18068481439. The next prime is 18068481451. The reversal of 18068481440 is 4418486081.

It is a junction number, because it is equal to n+sod(n) for n = 18068481391 and 18068481400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1816460 + ... + 1826379.

It is an arithmetic number, because the mean of its divisors is an integer number (917995680).

Almost surely, 2^18068481440 is an apocalyptic number.

18068481440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18068481440 is an abundant number, since it is smaller than the sum of its proper divisors (25995311200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18068481440 is a wasteful number, since it uses less digits than its factorization.

18068481440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642885 (or 3642877 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 18068481440 in words is "eighteen billion, sixty-eight million, four hundred eighty-one thousand, four hundred forty".