18875057 has 4 divisors (see below), whose sum is σ = 18943476. Its totient is φ = 18806640.

The previous prime is 18875053. The next prime is 18875071. The reversal of 18875057 is 75057881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1100401 + 17774656 = 1049^2 + 4216^2 .

It is a cyclic number.

It is not a de Polignac number, because 18875057 - 2² = 18875053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18875053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33794 + ... + 34347.

It is an arithmetic number, because the mean of its divisors is an integer number (4735869).

Almost surely, 2^18875057 is an apocalyptic number.

It is an amenable number.

18875057 is a deficient number, since it is larger than the sum of its proper divisors (68419).

18875057 is an equidigital number, since it uses as much as digits as its factorization.

18875057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68418.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 18875057 is about 4344.5433592036. The cubic root of 18875057 is about 266.2539690975.

The spelling of 18875057 in words is "eighteen million, eight hundred seventy-five thousand, fifty-seven".