18052649 has 4 divisors (see below), whose sum is σ = 18061440. Its totient is φ = 18043860.

The previous prime is 18052637. The next prime is 18052651. The reversal of 18052649 is 94625081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18052649 - 2¹² = 18048553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18012649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512 + ... + 6030.

It is an arithmetic number, because the mean of its divisors is an integer number (4515360).

Almost surely, 2^18052649 is an apocalyptic number.

It is an amenable number.

18052649 is a deficient number, since it is larger than the sum of its proper divisors (8791).

18052649 is an equidigital number, since it uses as much as digits as its factorization.

18052649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 18052649 is about 4248.8409007634. The cubic root of 18052649 is about 262.3294081329.

The spelling of 18052649 in words is "eighteen million, fifty-two thousand, six hundred forty-nine".