18539514 has 24 divisors (see below), whose sum is σ = 45907680. Its totient is φ = 5296968.

The previous prime is 18539509. The next prime is 18539527. The reversal of 18539514 is 41593581.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73444 + ... + 73695.

It is an arithmetic number, because the mean of its divisors is an integer number (1912820).

Almost surely, 2^18539514 is an apocalyptic number.

18539514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18539514 is an abundant number, since it is smaller than the sum of its proper divisors (27368166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18539514 is a wasteful number, since it uses less digits than its factorization.

18539514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147154 (or 147151 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 18539514 is about 4305.7535925782. The cubic root of 18539514 is about 264.6667889806. Note that the first 3 decimals are identical.

The spelling of 18539514 in words is "eighteen million, five hundred thirty-nine thousand, five hundred fourteen".