18861446 has 4 divisors (see below), whose sum is σ = 28292172. Its totient is φ = 9430722.

The previous prime is 18861439. The next prime is 18861457. The reversal of 18861446 is 64416881.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4715360 + ... + 4715363.

It is an arithmetic number, because the mean of its divisors is an integer number (7073043).

Almost surely, 2^18861446 is an apocalyptic number.

18861446 is a deficient number, since it is larger than the sum of its proper divisors (9430726).

18861446 is an equidigital number, since it uses as much as digits as its factorization.

18861446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9430725.

The product of its digits is 36864, while the sum is 38.

The square root of 18861446 is about 4342.9766289954. The cubic root of 18861446 is about 266.1899542052.

The spelling of 18861446 in words is "eighteen million, eight hundred sixty-one thousand, four hundred forty-six".