18487446 has 16 divisors (see below), whose sum is σ = 38582784. Its totient is φ = 5894504.

The previous prime is 18487429. The next prime is 18487459. The reversal of 18487446 is 64478481.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18487398 and 18487407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66846 + ... + 67121.

It is an arithmetic number, because the mean of its divisors is an integer number (2411424).

Almost surely, 2^18487446 is an apocalyptic number.

18487446 is an abundant number, since it is smaller than the sum of its proper divisors (20095338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18487446 is a wasteful number, since it uses less digits than its factorization.

18487446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133995.

The product of its digits is 172032, while the sum is 42.

The square root of 18487446 is about 4299.7030129999. The cubic root of 18487446 is about 264.4187855093.

The spelling of 18487446 in words is "eighteen million, four hundred eighty-seven thousand, four hundred forty-six".