18700045 has 32 divisors (see below), whose sum is σ = 28046592. Its totient is φ = 11653632.

The previous prime is 18700039. The next prime is 18700061. The reversal of 18700045 is 54000781.

It is a cyclic number.

It is not a de Polignac number, because 18700045 - 2⁵ = 18700013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18699992 and 18700019.

It is a congruent number.

It is an unprimeable number.

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, 32934 + ... + 33496.

It is an arithmetic number, because the mean of its divisors is an integer number (876456).

Almost surely, 2^18700045 is an apocalyptic number.

It is an amenable number.

18700045 is a deficient number, since it is larger than the sum of its proper divisors (9346547).

18700045 is a wasteful number, since it uses less digits than its factorization.

18700045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18700045 is about 4324.3548651793. The cubic root of 18700045 is about 265.4284986378.

The spelling of 18700045 in words is "eighteen million, seven hundred thousand, forty-five".