18041688 has 48 divisors (see below), whose sum is σ = 55844880. Its totient is φ = 5154624.

The previous prime is 18041671. The next prime is 18041711. The reversal of 18041688 is 88614081.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 in 11 ways as a sum of consecutive naturals, for example, 17395 + ... + 18402.

It is an arithmetic number, because the mean of its divisors is an integer number (1163435).

Almost surely, 2^18041688 is an apocalyptic number.

18041688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18041688 is an abundant number, since it is smaller than the sum of its proper divisors (37803192).

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

18041688 is a wasteful number, since it uses less digits than its factorization.

18041688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35816 (or 35809 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 18041688 is about 4247.5508237101. The cubic root of 18041688 is about 262.2763046652.

The spelling of 18041688 in words is "eighteen million, forty-one thousand, six hundred eighty-eight".