18080446 has 4 divisors (see below), whose sum is σ = 27120672. Its totient is φ = 9040222.

The previous prime is 18080441. The next prime is 18080453. The reversal of 18080446 is 64408081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18080441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520110 + ... + 4520113.

It is an arithmetic number, because the mean of its divisors is an integer number (6780168).

Almost surely, 2^18080446 is an apocalyptic number.

18080446 is a deficient number, since it is larger than the sum of its proper divisors (9040226).

18080446 is an equidigital number, since it uses as much as digits as its factorization.

18080446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9040225.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 18080446 is about 4252.1107699588. The cubic root of 18080446 is about 262.4639817550.

The spelling of 18080446 in words is "eighteen million, eighty thousand, four hundred forty-six".