18120370 has 8 divisors (see below), whose sum is σ = 32616684. Its totient is φ = 7248144.

The previous prime is 18120367. The next prime is 18120373. The reversal of 18120370 is 7302181.

It is an interprime number because it is at equal distance from previous prime (18120367) and next prime (18120373).

It can be written as a sum of positive squares in 2 ways, for example, as 17648401 + 471969 = 4201^2 + 687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18120373) 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 3 ways as a sum of consecutive naturals, for example, 906009 + ... + 906028.

Almost surely, 2^18120370 is an apocalyptic number.

18120370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18120370 is a deficient number, since it is larger than the sum of its proper divisors (14496314).

18120370 is a wasteful number, since it uses less digits than its factorization.

18120370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812044.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 18120370 is about 4256.8027908279. The cubic root of 18120370 is about 262.6570247204.

It can be divided in two parts, 181 and 20370, that multiplied together give a triangular number (3686970 = T₂₇₁₅).

The spelling of 18120370 in words is "eighteen million, one hundred twenty thousand, three hundred seventy".