18655276081 has 12 divisors (see below), whose sum is σ = 20204535900. Its totient is φ = 17216971200.

The previous prime is 18655276067. The next prime is 18655276097. The reversal of 18655276081 is 18067255681.

It can be written as a sum of positive squares in 6 ways, for example, as 730350625 + 17924925456 = 27025^2 + 133884^2 .

It is not a de Polignac number, because 18655276081 - 2⁷ = 18655275953 is a prime.

It is a super-2 number, since 2×18655276081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18655276481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1667695 + ... + 1678843.

It is an arithmetic number, because the mean of its divisors is an integer number (1683711325).

Almost surely, 2^18655276081 is an apocalyptic number.

It is an amenable number.

18655276081 is a deficient number, since it is larger than the sum of its proper divisors (1549259819).

18655276081 is a wasteful number, since it uses less digits than its factorization.

18655276081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21076 (or 21063 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 18655276081 in words is "eighteen billion, six hundred fifty-five million, two hundred seventy-six thousand, eighty-one".