18157450 has 12 divisors (see below), whose sum is σ = 33772950. Its totient is φ = 7262960.

The previous prime is 18157441. The next prime is 18157459. The reversal of 18157450 is 5475181.

It is an interprime number because it is at equal distance from previous prime (18157441) and next prime (18157459).

It can be written as a sum of positive squares in 3 ways, for example, as 13461561 + 4695889 = 3669^2 + 2167^2 .

It is not an unprimeable number, because it can be changed into a prime (18157459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181525 + ... + 181624.

Almost surely, 2^18157450 is an apocalyptic number.

18157450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18157450 is a deficient number, since it is larger than the sum of its proper divisors (15615500).

18157450 is a wasteful number, since it uses less digits than its factorization.

18157450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363161 (or 363156 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 18157450 is about 4261.1559464540. The cubic root of 18157450 is about 262.8360623960.

The spelling of 18157450 in words is "eighteen million, one hundred fifty-seven thousand, four hundred fifty".