18182745 has 64 divisors (see below), whose sum is σ = 37601280. Its totient is φ = 8164800.

The previous prime is 18182743. The next prime is 18182761. The reversal of 18182745 is 54728181.

It is not a de Polignac number, because 18182745 - 2¹ = 18182743 is a prime.

It is a super-2 number, since 2×18182745² = 661224431470050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18182743) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66960 + ... + 67230.

It is an arithmetic number, because the mean of its divisors is an integer number (587520).

Almost surely, 2^18182745 is an apocalyptic number.

18182745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18182745 is an abundant number, since it is smaller than the sum of its proper divisors (19418535).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18182745 is a wasteful number, since it uses less digits than its factorization.

18182745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 357 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 18182745 is about 4264.1230047924. The cubic root of 18182745 is about 262.9580573768.

The spelling of 18182745 in words is "eighteen million, one hundred eighty-two thousand, seven hundred forty-five".