20946818 has 16 divisors (see below), whose sum is σ = 32314464. Its totient is φ = 10177440.

The previous prime is 20946817. The next prime is 20946833. The reversal of 20946818 is 81864902.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20946817) 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, 38021 + ... + 38567.

It is an arithmetic number, because the mean of its divisors is an integer number (2019654).

Almost surely, 2^20946818 is an apocalyptic number.

20946818 is a deficient number, since it is larger than the sum of its proper divisors (11367646).

20946818 is a wasteful number, since it uses less digits than its factorization.

20946818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 20946818 is about 4576.7693846206. The cubic root of 20946818 is about 275.6593237661.

The spelling of 20946818 in words is "twenty million, nine hundred forty-six thousand, eight hundred eighteen".