18555053 has 4 divisors (see below), whose sum is σ = 20241888. Its totient is φ = 16868220.

The previous prime is 18555049. The next prime is 18555071. The reversal of 18555053 is 35055581.

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.

It is a cyclic number.

It is not a de Polignac number, because 18555053 - 2² = 18555049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555073) 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, 843401 + ... + 843422.

It is an arithmetic number, because the mean of its divisors is an integer number (5060472).

Almost surely, 2^18555053 is an apocalyptic number.

It is an amenable number.

18555053 is a deficient number, since it is larger than the sum of its proper divisors (1686835).

18555053 is a wasteful number, since it uses less digits than its factorization.

18555053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686834.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 18555053 is about 4307.5576606704. The cubic root of 18555053 is about 264.7407123271.

The spelling of 18555053 in words is "eighteen million, five hundred fifty-five thousand, fifty-three".