18750016 has 14 divisors (see below), whose sum is σ = 37207190. Its totient is φ = 9374976.

The previous prime is 18750001. The next prime is 18750019. The reversal of 18750016 is 61005781.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 87616 = 4320^2 + 296^2 .

It is not an unprimeable number, because it can be changed into a prime (18750019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 146421 + ... + 146548.

Almost surely, 2^18750016 is an apocalyptic number.

18750016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18750016 is a deficient number, since it is larger than the sum of its proper divisors (18457174).

18750016 is an equidigital number, since it uses as much as digits as its factorization.

18750016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292981 (or 292971 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 18750016 is about 4330.1288664427. The cubic root of 18750016 is about 265.6647178625.

Adding to 18750016 its reverse (61005781), we get a palindrome (79755797).

The spelling of 18750016 in words is "eighteen million, seven hundred fifty thousand, sixteen".