18270645 has 8 divisors (see below), whose sum is σ = 29233056. Its totient is φ = 9744336.

The previous prime is 18270641. The next prime is 18270653. The reversal of 18270645 is 54607281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18270645 - 2² = 18270641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18270641) 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 7 ways as a sum of consecutive naturals, for example, 609007 + ... + 609036.

It is an arithmetic number, because the mean of its divisors is an integer number (3654132).

Almost surely, 2^18270645 is an apocalyptic number.

18270645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18270645 is a deficient number, since it is larger than the sum of its proper divisors (10962411).

18270645 is a wasteful number, since it uses less digits than its factorization.

18270645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218051.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 18270645 is about 4274.4175041753. The cubic root of 18270645 is about 263.3811116996.

It can be divided in two parts, 18270 and 645, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 18270645 in words is "eighteen million, two hundred seventy thousand, six hundred forty-five".