18252091 has 8 divisors (see below), whose sum is σ = 21443184. Its totient is φ = 15316320.

The previous prime is 18252083. The next prime is 18252109. The reversal of 18252091 is 19025281.

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

It is a cyclic number.

It is not a de Polignac number, because 18252091 - 2³ = 18252083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18252001) 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 7 ways as a sum of consecutive naturals, for example, 63676 + ... + 63961.

It is an arithmetic number, because the mean of its divisors is an integer number (2680398).

Almost surely, 2^18252091 is an apocalyptic number.

18252091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18252091 is a deficient number, since it is larger than the sum of its proper divisors (3191093).

18252091 is a wasteful number, since it uses less digits than its factorization.

18252091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127661.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 18252091 is about 4272.2465986879. The cubic root of 18252091 is about 263.2919262281.

It can be divided in two parts, 1825 and 2091, that added together give a triangular number (3916 = T₈₈).

The spelling of 18252091 in words is "eighteen million, two hundred fifty-two thousand, ninety-one".