18406498 has 32 divisors (see below), whose sum is σ = 31477248. Its totient is φ = 7996800.

The previous prime is 18406489. The next prime is 18406511. The reversal of 18406498 is 89460481.

It is a self number, because there is not a number n which added to its sum of digits gives 18406498.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 93336 + ... + 93532.

It is an arithmetic number, because the mean of its divisors is an integer number (983664).

Almost surely, 2^18406498 is an apocalyptic number.

18406498 is a deficient number, since it is larger than the sum of its proper divisors (13070750).

18406498 is a wasteful number, since it uses less digits than its factorization.

18406498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 18406498 is about 4290.2794780760. The cubic root of 18406498 is about 264.0322982370.

It can be divided in two parts, 1840 and 6498, that added together give a palindrome (8338).

The spelling of 18406498 in words is "eighteen million, four hundred six thousand, four hundred ninety-eight".