18062120 has 16 divisors (see below), whose sum is σ = 40639860. Its totient is φ = 7224832.

The previous prime is 18062117. The next prime is 18062123. The reversal of 18062120 is 2126081.

It is an interprime number because it is at equal distance from previous prime (18062117) and next prime (18062123).

It can be written as a sum of positive squares in 2 ways, for example, as 17255716 + 806404 = 4154^2 + 898^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 18062092 and 18062101.

It is not an unprimeable number, because it can be changed into a prime (18062123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 225737 + ... + 225816.

Almost surely, 2^18062120 is an apocalyptic number.

18062120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18062120 is an abundant number, since it is smaller than the sum of its proper divisors (22577740).

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

18062120 is a wasteful number, since it uses less digits than its factorization.

18062120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451564 (or 451560 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 18062120 is about 4249.9552938825. The cubic root of 18062120 is about 262.3752755928.

The spelling of 18062120 in words is "eighteen million, sixty-two thousand, one hundred twenty".