18076861 has 4 divisors (see below), whose sum is σ = 19720224. Its totient is φ = 16433500.

The previous prime is 18076843. The next prime is 18076867. The reversal of 18076861 is 16867081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18076861 - 2⁹ = 18076349 is a prime.

It is a super-2 number, since 2×18076861² = 653545807226642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18076861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18076867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821665 + ... + 821686.

It is an arithmetic number, because the mean of its divisors is an integer number (4930056).

Almost surely, 2^18076861 is an apocalyptic number.

18076861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18076861 is a deficient number, since it is larger than the sum of its proper divisors (1643363).

18076861 is a wasteful number, since it uses less digits than its factorization.

18076861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643362.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 18076861 is about 4251.6891937205. The cubic root of 18076861 is about 262.4466334445.

It can be divided in two parts, 1807 and 6861, that added together give a palindrome (8668).

The spelling of 18076861 in words is "eighteen million, seventy-six thousand, eight hundred sixty-one".