20120518 has 8 divisors (see below), whose sum is σ = 32924520. Its totient is φ = 9145680.

The previous prime is 20120509. The next prime is 20120531. The reversal of 20120518 is 81502102.

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

It is a junction number, because it is equal to n+sod(n) for n = 20120495 and 20120504.

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 3 ways as a sum of consecutive naturals, for example, 457263 + ... + 457306.

It is an arithmetic number, because the mean of its divisors is an integer number (4115565).

Almost surely, 2^20120518 is an apocalyptic number.

20120518 is a deficient number, since it is larger than the sum of its proper divisors (12804002).

20120518 is a wasteful number, since it uses less digits than its factorization.

20120518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914582.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 20120518 is about 4485.5900392256. The cubic root of 20120518 is about 271.9858971206.

The spelling of 20120518 in words is "twenty million, one hundred twenty thousand, five hundred eighteen".