18770081 has 8 divisors (see below), whose sum is σ = 21554400. Its totient is φ = 16165440.

The previous prime is 18770077. The next prime is 18770099. The reversal of 18770081 is 18007781.

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 18770081 - 2² = 18770077 is a prime.

It is a super-2 number, since 2×18770081² = 704631881493122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18770021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44696 + ... + 45113.

It is an arithmetic number, because the mean of its divisors is an integer number (2694300).

Almost surely, 2^18770081 is an apocalyptic number.

18770081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18770081 is a deficient number, since it is larger than the sum of its proper divisors (2784319).

18770081 is a wasteful number, since it uses less digits than its factorization.

18770081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89839.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 18770081 is about 4332.4451525669. The cubic root of 18770081 is about 265.7594495545.

It can be divided in two parts, 187700 and 81, that added together give a palindrome (187781).

The spelling of 18770081 in words is "eighteen million, seven hundred seventy thousand, eighty-one".