18555045 has 16 divisors (see below), whose sum is σ = 29880960. Its totient is φ = 9831744.

The previous prime is 18555029. The next prime is 18555049. The reversal of 18555045 is 54055581.

It is not a de Polignac number, because 18555045 - 2⁴ = 18555029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18554997 and 18555015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1585 + ... + 6294.

It is an arithmetic number, because the mean of its divisors is an integer number (1867560).

Almost surely, 2^18555045 is an apocalyptic number.

18555045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18555045 is a deficient number, since it is larger than the sum of its proper divisors (11325915).

18555045 is a wasteful number, since it uses less digits than its factorization.

18555045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 18555045 is about 4307.5567320698. The cubic root of 18555045 is about 264.7406742795.

The spelling of 18555045 in words is "eighteen million, five hundred fifty-five thousand, forty-five".