18800881 has 12 divisors (see below), whose sum is σ = 20906064. Its totient is φ = 16767800.

The previous prime is 18800879. The next prime is 18800897.

18800881 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18800881 - 2¹ = 18800879 is a prime.

It is a super-2 number, since 2×18800881² = 706946252752322, which contains 22 as substring.

18800881 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18800801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38046 + ... + 38536.

It is an arithmetic number, because the mean of its divisors is an integer number (1742172).

Almost surely, 2^18800881 is an apocalyptic number.

18800881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18800881 is a deficient number, since it is larger than the sum of its proper divisors (2105183).

18800881 is an equidigital number, since it uses as much as digits as its factorization.

18800881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 34.

The square root of 18800881 is about 4335.9982702949. The cubic root of 18800881 is about 265.9047324999.

The spelling of 18800881 in words is "eighteen million, eight hundred thousand, eight hundred eighty-one".