18055057 has 4 divisors (see below), whose sum is σ = 18109936. Its totient is φ = 18000180.

The previous prime is 18055049. The next prime is 18055061. The reversal of 18055057 is 75055081.

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 an emirpimes, since its reverse is a distinct semiprime: 75055081 = 43 ⋅1745467.

It is a cyclic number.

It is not a de Polignac number, because 18055057 - 2³ = 18055049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18035057) 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, 26943 + ... + 27604.

It is an arithmetic number, because the mean of its divisors is an integer number (4527484).

Almost surely, 2^18055057 is an apocalyptic number.

It is an amenable number.

18055057 is a deficient number, since it is larger than the sum of its proper divisors (54879).

18055057 is an equidigital number, since it uses as much as digits as its factorization.

18055057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54878.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 18055057 is about 4249.1242627158. The cubic root of 18055057 is about 262.3410714467.

The spelling of 18055057 in words is "eighteen million, fifty-five thousand, fifty-seven".