18506494 has 8 divisors (see below), whose sum is σ = 29220840. Its totient is φ = 8766216.

The previous prime is 18506483. The next prime is 18506503. The reversal of 18506494 is 49460581.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243469 + ... + 243544.

It is an arithmetic number, because the mean of its divisors is an integer number (3652605).

Almost surely, 2^18506494 is an apocalyptic number.

18506494 is a deficient number, since it is larger than the sum of its proper divisors (10714346).

18506494 is a wasteful number, since it uses less digits than its factorization.

18506494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487034.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18506494 is about 4301.9174794503. The cubic root of 18506494 is about 264.5095663961.

The spelling of 18506494 in words is "eighteen million, five hundred six thousand, four hundred ninety-four".