18201057 has 8 divisors (see below), whose sum is σ = 27734976. Its totient is φ = 10400592.

The previous prime is 18201049. The next prime is 18201059. The reversal of 18201057 is 75010281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18201057 - 2³ = 18201049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18201059) 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 7 ways as a sum of consecutive naturals, for example, 433338 + ... + 433379.

It is an arithmetic number, because the mean of its divisors is an integer number (3466872).

Almost surely, 2^18201057 is an apocalyptic number.

It is an amenable number.

18201057 is a deficient number, since it is larger than the sum of its proper divisors (9533919).

18201057 is an equidigital number, since it uses as much as digits as its factorization.

18201057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866727.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 18201057 is about 4266.2696820525. The cubic root of 18201057 is about 263.0463035381.

The spelling of 18201057 in words is "eighteen million, two hundred one thousand, fifty-seven".