18364545 has 48 divisors (see below), whose sum is σ = 34295040. Its totient is φ = 9061632.

The previous prime is 18364519. The next prime is 18364547. The reversal of 18364545 is 54546381.

It is a happy number.

18364545 is a `hidden beast` number, since 1 + 8 + 3 + 645 + 4 + 5 = 666.

It is not a de Polignac number, because 18364545 - 2⁵ = 18364513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18364547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39957 + ... + 40413.

It is an arithmetic number, because the mean of its divisors is an integer number (714480).

Almost surely, 2^18364545 is an apocalyptic number.

18364545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18364545 is a deficient number, since it is larger than the sum of its proper divisors (15930495).

18364545 is a wasteful number, since it uses less digits than its factorization.

18364545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 531 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 18364545 is about 4285.3873803893. The cubic root of 18364545 is about 263.8315471510.

The spelling of 18364545 in words is "eighteen million, three hundred sixty-four thousand, five hundred forty-five".