18368650 has 24 divisors (see below), whose sum is σ = 35092620. Its totient is φ = 7148160.

The previous prime is 18368641. The next prime is 18368657. The reversal of 18368650 is 5686381.

It can be written as a sum of positive squares in 6 ways, for example, as 7890481 + 10478169 = 2809^2 + 3237^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (18368657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3115 + ... + 6814.

Almost surely, 2^18368650 is an apocalyptic number.

18368650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18368650 is a deficient number, since it is larger than the sum of its proper divisors (16723970).

18368650 is a wasteful number, since it uses less digits than its factorization.

18368650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9978 (or 9973 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18368650 is about 4285.8663068276. The cubic root of 18368650 is about 263.8512036470.

The spelling of 18368650 in words is "eighteen million, three hundred sixty-eight thousand, six hundred fifty".