20818334 has 16 divisors (see below), whose sum is σ = 31752000. Its totient is φ = 10235904.

The previous prime is 20818333. The next prime is 20818337. The reversal of 20818334 is 43381802.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20818297 and 20818306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20818333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46142 + ... + 46590.

It is an arithmetic number, because the mean of its divisors is an integer number (1984500).

Almost surely, 2^20818334 is an apocalyptic number.

20818334 is a deficient number, since it is larger than the sum of its proper divisors (10933666).

20818334 is a wasteful number, since it uses less digits than its factorization.

20818334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20818334 is about 4562.7112553831. The cubic root of 20818334 is about 275.0945526104.

The spelling of 20818334 in words is "twenty million, eight hundred eighteen thousand, three hundred thirty-four".