18012850 has 12 divisors (see below), whose sum is σ = 33503994. Its totient is φ = 7205120.

The previous prime is 18012847. The next prime is 18012853. The reversal of 18012850 is 5821081.

It is an interprime number because it is at equal distance from previous prime (18012847) and next prime (18012853).

It can be written as a sum of positive squares in 3 ways, for example, as 16818201 + 1194649 = 4101^2 + 1093^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18012853) 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, 180079 + ... + 180178.

Almost surely, 2^18012850 is an apocalyptic number.

18012850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18012850 is a deficient number, since it is larger than the sum of its proper divisors (15491144).

18012850 is a wasteful number, since it uses less digits than its factorization.

18012850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360269 (or 360264 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 18012850 is about 4244.1548039627. The cubic root of 18012850 is about 262.1364885252.

The spelling of 18012850 in words is "eighteen million, twelve thousand, eight hundred fifty".