18094420 has 12 divisors (see below), whose sum is σ = 37998324. Its totient is φ = 7237760.

The previous prime is 18094387. The next prime is 18094423. The reversal of 18094420 is 2449081.

It can be written as a sum of positive squares in 2 ways, for example, as 7828804 + 10265616 = 2798^2 + 3204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18094423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452341 + ... + 452380.

It is an arithmetic number, because the mean of its divisors is an integer number (3166527).

Almost surely, 2^18094420 is an apocalyptic number.

18094420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18094420 is an abundant number, since it is smaller than the sum of its proper divisors (19903904).

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

18094420 is a wasteful number, since it uses less digits than its factorization.

18094420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904730 (or 904728 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18094420 is about 4253.7536364957. The cubic root of 18094420 is about 262.5315819900.

The spelling of 18094420 in words is "eighteen million, ninety-four thousand, four hundred twenty".