18411845 has 12 divisors (see below), whose sum is σ = 23099916. Its totient is φ = 14087040.

The previous prime is 18411803. The next prime is 18411857. The reversal of 18411845 is 54811481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10666756 + 7745089 = 3266^2 + 2783^2 .

It is not a de Polignac number, because 18411845 - 2¹² = 18407749 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 836 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (1924993).

Almost surely, 2^18411845 is an apocalyptic number.

It is an amenable number.

18411845 is a deficient number, since it is larger than the sum of its proper divisors (4688071).

18411845 is an equidigital number, since it uses as much as digits as its factorization.

18411845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012 (or 6989 counting only the distinct ones).

The product of its digits is 5120, while the sum is 32.

The square root of 18411845 is about 4290.9025857039. The cubic root of 18411845 is about 264.0578624701.

The spelling of 18411845 in words is "eighteen million, four hundred eleven thousand, eight hundred forty-five".