18200070 has 72 divisors (see below), whose sum is σ = 55059264. Its totient is φ = 4159008.

The previous prime is 18200059. The next prime is 18200087. The reversal of 18200070 is 7000281.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

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 35 ways as a sum of consecutive naturals, for example, 2347 + ... + 6473.

It is an arithmetic number, because the mean of its divisors is an integer number (764712).

Almost surely, 2^18200070 is an apocalyptic number.

18200070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18200070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27529632).

18200070 is an abundant number, since it is smaller than the sum of its proper divisors (36859194).

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

18200070 is a wasteful number, since it uses less digits than its factorization.

18200070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154 (or 4144 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 18200070 is about 4266.1540056590. The cubic root of 18200070 is about 263.0415486605.

The spelling of 18200070 in words is "eighteen million, two hundred thousand, seventy".