20703218 has 16 divisors (see below), whose sum is σ = 32261760. Its totient is φ = 9956976.

The previous prime is 20703211. The next prime is 20703223. The reversal of 20703218 is 81230702.

It is a junction number, because it is equal to n+sod(n) for n = 20703193 and 20703202.

It is not an unprimeable number, because it can be changed into a prime (20703211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3680 + ... + 7412.

It is an arithmetic number, because the mean of its divisors is an integer number (2016360).

Almost surely, 2^20703218 is an apocalyptic number.

20703218 is a deficient number, since it is larger than the sum of its proper divisors (11558542).

20703218 is a wasteful number, since it uses less digits than its factorization.

20703218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20703218 is about 4550.0789004148. The cubic root of 20703218 is about 274.5865655318.

The spelling of 20703218 in words is "twenty million, seven hundred three thousand, two hundred eighteen".