18819045 has 24 divisors (see below), whose sum is σ = 37280256. Its totient is φ = 8602848.

The previous prime is 18819043. The next prime is 18819061. The reversal of 18819045 is 54091881.

It is not a de Polignac number, because 18819045 - 2¹ = 18819043 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18819043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29557 + ... + 30186.

It is an arithmetic number, because the mean of its divisors is an integer number (1553344).

Almost surely, 2^18819045 is an apocalyptic number.

18819045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18819045 is a deficient number, since it is larger than the sum of its proper divisors (18461211).

18819045 is a wasteful number, since it uses less digits than its factorization.

18819045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59761 (or 59758 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18819045 is about 4338.0923226690. The cubic root of 18819045 is about 265.9903373353.

The spelling of 18819045 in words is "eighteen million, eight hundred nineteen thousand, forty-five".