18648406 has 16 divisors (see below), whose sum is σ = 32038560. Its totient is φ = 7974720.

The previous prime is 18648401. The next prime is 18648431. The reversal of 18648406 is 60484681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18648401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6796 + ... + 9136.

It is an arithmetic number, because the mean of its divisors is an integer number (2002410).

Almost surely, 2^18648406 is an apocalyptic number.

18648406 is a deficient number, since it is larger than the sum of its proper divisors (13390154).

18648406 is a wasteful number, since it uses less digits than its factorization.

18648406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 18648406 is about 4318.3800203317. The cubic root of 18648406 is about 265.1839520223.

The spelling of 18648406 in words is "eighteen million, six hundred forty-eight thousand, four hundred six".