18072653 has 4 divisors (see below), whose sum is σ = 18368988. Its totient is φ = 17776320.

The previous prime is 18072569. The next prime is 18072661. The reversal of 18072653 is 35627081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3912484 + 14160169 = 1978^2 + 3763^2 .

It is a cyclic number.

It is not a de Polignac number, because 18072653 - 2²² = 13878349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148076 + ... + 148197.

It is an arithmetic number, because the mean of its divisors is an integer number (4592247).

Almost surely, 2^18072653 is an apocalyptic number.

It is an amenable number.

18072653 is a deficient number, since it is larger than the sum of its proper divisors (296335).

18072653 is an equidigital number, since it uses as much as digits as its factorization.

18072653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296334.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 18072653 is about 4251.1943027813. The cubic root of 18072653 is about 262.4262674245.

The spelling of 18072653 in words is "eighteen million, seventy-two thousand, six hundred fifty-three".