18406484 has 6 divisors (see below), whose sum is σ = 32211354. Its totient is φ = 9203240.

The previous prime is 18406483. The next prime is 18406489. The reversal of 18406484 is 48460481.

It can be written as a sum of positive squares in only one way, i.e., 13162384 + 5244100 = 3628^2 + 2290^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18406483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2300807 + ... + 2300814.

It is an arithmetic number, because the mean of its divisors is an integer number (5368559).

Almost surely, 2^18406484 is an apocalyptic number.

It is an amenable number.

18406484 is a deficient number, since it is larger than the sum of its proper divisors (13804870).

18406484 is a wasteful number, since it uses less digits than its factorization.

18406484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601625 (or 4601623 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 18406484 is about 4290.2778464803. The cubic root of 18406484 is about 264.0322312959.

The spelling of 18406484 in words is "eighteen million, four hundred six thousand, four hundred eighty-four".