18203045 has 32 divisors (see below), whose sum is σ = 27156480. Its totient is φ = 11430720.

The previous prime is 18203041. The next prime is 18203063. The reversal of 18203045 is 54030281.

It is not a de Polignac number, because 18203045 - 2² = 18203041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18203045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18203041) 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 31 ways as a sum of consecutive naturals, for example, 20174 + ... + 21056.

It is an arithmetic number, because the mean of its divisors is an integer number (848640).

Almost surely, 2^18203045 is an apocalyptic number.

It is an amenable number.

18203045 is a deficient number, since it is larger than the sum of its proper divisors (8953435).

18203045 is a wasteful number, since it uses less digits than its factorization.

18203045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18203045 is about 4266.5026661189. The cubic root of 18203045 is about 263.0558802165.

The spelling of 18203045 in words is "eighteen million, two hundred three thousand, forty-five".