18070000 has 100 divisors (see below), whose sum is σ = 47453560. Its totient is φ = 6624000.

The previous prime is 18069983. The next prime is 18070001. The reversal of 18070000 is 7081.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18070001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 129931 + ... + 130069.

Almost surely, 2^18070000 is an apocalyptic number.

18070000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18070000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23726780).

18070000 is an abundant number, since it is smaller than the sum of its proper divisors (29383560).

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

18070000 is a wasteful number, since it uses less digits than its factorization.

18070000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 18070000 is about 4250.8822613665. The cubic root of 18070000 is about 262.4134257210.

Adding to 18070000 its reverse (7081), we get a palindrome (18077081).

The spelling of 18070000 in words is "eighteen million, seventy thousand".