18280481558069 has 32 divisors (see below), whose sum is σ = 19627823494656. Its totient is φ = 16980992582400.

The previous prime is 18280481557993. The next prime is 18280481558077. The reversal of 18280481558069 is 96085518408281.

It is a cyclic number.

It is not a de Polignac number, because 18280481558069 - 2³² = 18276186590773 is a prime.

It is a super-2 number, since 2×18280481558069² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18280481557996 and 18280481558014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280481558369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1596961304 + ... + 1596972750.

It is an arithmetic number, because the mean of its divisors is an integer number (613369484208).

Almost surely, 2^{18280481558069} is an apocalyptic number.

It is an amenable number.

18280481558069 is a deficient number, since it is larger than the sum of its proper divisors (1347341936587).

18280481558069 is a wasteful number, since it uses less digits than its factorization.

18280481558069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14885.

The product of its (nonzero) digits is 44236800, while the sum is 65.

The spelling of 18280481558069 in words is "eighteen trillion, two hundred eighty billion, four hundred eighty-one million, five hundred fifty-eight thousand, sixty-nine".