18039854 has 16 divisors (see below), whose sum is σ = 32553600. Its totient is φ = 7324344.

The previous prime is 18039823. The next prime is 18039871. The reversal of 18039854 is 45893081.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33644 + ... + 34175.

It is an arithmetic number, because the mean of its divisors is an integer number (2034600).

Almost surely, 2^18039854 is an apocalyptic number.

18039854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18039854 is a deficient number, since it is larger than the sum of its proper divisors (14513746).

18039854 is a wasteful number, since it uses less digits than its factorization.

18039854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67847.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18039854 is about 4247.3349291055. The cubic root of 18039854 is about 262.2674172661.

The spelling of 18039854 in words is "eighteen million, thirty-nine thousand, eight hundred fifty-four".