18800146 has 4 divisors (see below), whose sum is σ = 28200222. Its totient is φ = 9400072.

The previous prime is 18800137. The next prime is 18800153. The reversal of 18800146 is 64100881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64100881 = 13 ⋅4930837.

It can be written as a sum of positive squares in only one way, i.e., 18792225 + 7921 = 4335^2 + 89^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4700035 + ... + 4700038.

Almost surely, 2^18800146 is an apocalyptic number.

18800146 is a deficient number, since it is larger than the sum of its proper divisors (9400076).

18800146 is an equidigital number, since it uses as much as digits as its factorization.

18800146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9400075.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18800146 is about 4335.9135138976. The cubic root of 18800146 is about 265.9012673693.

The spelling of 18800146 in words is "eighteen million, eight hundred thousand, one hundred forty-six".