18072045 has 32 divisors (see below), whose sum is σ = 32313600. Its totient is φ = 9582912.

The previous prime is 18072029. The next prime is 18072049. The reversal of 18072045 is 54027081.

It is not a de Polignac number, because 18072045 - 2⁴ = 18072029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072049) 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 31 ways as a sum of consecutive naturals, for example, 35251 + ... + 35759.

It is an arithmetic number, because the mean of its divisors is an integer number (1009800).

Almost surely, 2^18072045 is an apocalyptic number.

18072045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18072045 is a deficient number, since it is larger than the sum of its proper divisors (14241555).

18072045 is a wasteful number, since it uses less digits than its factorization.

18072045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18072045 is about 4251.1227928631. The cubic root of 18072045 is about 262.4233245443.

The spelling of 18072045 in words is "eighteen million, seventy-two thousand, forty-five".