18857545 has 16 divisors (see below), whose sum is σ = 26104320. Its totient is φ = 12809664.

The previous prime is 18857533. The next prime is 18857591. The reversal of 18857545 is 54575881.

It is not a de Polignac number, because 18857545 - 2¹³ = 18849353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1344 + ... + 6286.

It is an arithmetic number, because the mean of its divisors is an integer number (1631520).

Almost surely, 2^18857545 is an apocalyptic number.

It is an amenable number.

18857545 is a deficient number, since it is larger than the sum of its proper divisors (7246775).

18857545 is a wasteful number, since it uses less digits than its factorization.

18857545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064.

The product of its digits is 224000, while the sum is 43.

The square root of 18857545 is about 4342.5274898381. The cubic root of 18857545 is about 266.1716014481.

The spelling of 18857545 in words is "eighteen million, eight hundred fifty-seven thousand, five hundred forty-five".