18010057 has 4 divisors (see below), whose sum is σ = 19395460. Its totient is φ = 16624656.

The previous prime is 18010051. The next prime is 18010061. The reversal of 18010057 is 75001081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75001081 = 257 ⋅291833.

It can be written as a sum of positive squares in 2 ways, for example, as 8156736 + 9853321 = 2856^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 18010057 - 2²³ = 9621449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18010051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692682 + ... + 692707.

It is an arithmetic number, because the mean of its divisors is an integer number (4848865).

Almost surely, 2^18010057 is an apocalyptic number.

It is an amenable number.

18010057 is a deficient number, since it is larger than the sum of its proper divisors (1385403).

18010057 is a wasteful number, since it uses less digits than its factorization.

18010057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385402.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 18010057 is about 4243.8257504285. The cubic root of 18010057 is about 262.1229392154.

The spelling of 18010057 in words is "eighteen million, ten thousand, fifty-seven".