18080969681 has 8 divisors (see below), whose sum is σ = 18530349024. Its totient is φ = 17632903680.

The previous prime is 18080969657. The next prime is 18080969693. The reversal of 18080969681 is 18696908081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18080969681 - 2²² = 18076775377 is a prime.

It is a super-2 number, since 2×18080969681² (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 (18080969611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300431 + ... + 355556.

It is an arithmetic number, because the mean of its divisors is an integer number (2316293628).

Almost surely, 2^18080969681 is an apocalyptic number.

It is an amenable number.

18080969681 is a deficient number, since it is larger than the sum of its proper divisors (449379343).

18080969681 is an equidigital number, since it uses as much as digits as its factorization.

18080969681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656671.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The spelling of 18080969681 in words is "eighteen billion, eighty million, nine hundred sixty-nine thousand, six hundred eighty-one".