18157850 has 12 divisors (see below), whose sum is σ = 33773694. Its totient is φ = 7263120.

The previous prime is 18157837. The next prime is 18157859. The reversal of 18157850 is 5875181.

It can be written as a sum of positive squares in 3 ways, for example, as 17032129 + 1125721 = 4127^2 + 1061^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18157850.

It is not an unprimeable number, because it can be changed into a prime (18157859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181529 + ... + 181628.

Almost surely, 2^18157850 is an apocalyptic number.

18157850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18157850 is a deficient number, since it is larger than the sum of its proper divisors (15615844).

18157850 is a wasteful number, since it uses less digits than its factorization.

18157850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363169 (or 363164 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 18157850 is about 4261.2028818164. The cubic root of 18157850 is about 262.8379924330.

The spelling of 18157850 in words is "eighteen million, one hundred fifty-seven thousand, eight hundred fifty".