18082788728081 has 32 divisors (see below), whose sum is σ = 23872108326912. Its totient is φ = 13260982959360.

The previous prime is 18082788728021. The next prime is 18082788728117.

18082788728081 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18082788728081 is a prime.

It is a super-2 number, since 2×18082788728081² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18082788728021) 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, 27248840 + ... + 27904566.

It is an arithmetic number, because the mean of its divisors is an integer number (746003385216).

Almost surely, 2^{18082788728081} is an apocalyptic number.

18082788728081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18082788728081 is a deficient number, since it is larger than the sum of its proper divisors (5789319598831).

18082788728081 is a wasteful number, since it uses less digits than its factorization.

18082788728081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676829.

The product of its (nonzero) digits is 51380224, while the sum is 68.

The spelling of 18082788728081 in words is "eighteen trillion, eighty-two billion, seven hundred eighty-eight million, seven hundred twenty-eight thousand, eighty-one".