18481654 has 4 divisors (see below), whose sum is σ = 27722484. Its totient is φ = 9240826.

The previous prime is 18481649. The next prime is 18481663. The reversal of 18481654 is 45618481.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4620412 + ... + 4620415.

It is an arithmetic number, because the mean of its divisors is an integer number (6930621).

Almost surely, 2^18481654 is an apocalyptic number.

18481654 is a deficient number, since it is larger than the sum of its proper divisors (9240830).

18481654 is an equidigital number, since it uses as much as digits as its factorization.

18481654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240829.

The product of its digits is 30720, while the sum is 37.

The square root of 18481654 is about 4299.0294253471. The cubic root of 18481654 is about 264.3911690469.

The spelling of 18481654 in words is "eighteen million, four hundred eighty-one thousand, six hundred fifty-four".