20700806 has 16 divisors (see below), whose sum is σ = 35548416. Its totient is φ = 8856456.

The previous prime is 20700791. The next prime is 20700817. The reversal of 20700806 is 60800702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11585 + ... + 13251.

It is an arithmetic number, because the mean of its divisors is an integer number (2221776).

Almost surely, 2^20700806 is an apocalyptic number.

20700806 is a deficient number, since it is larger than the sum of its proper divisors (14847610).

20700806 is a wasteful number, since it uses less digits than its factorization.

20700806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563.

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

The square root of 20700806 is about 4549.8138423456. The cubic root of 20700806 is about 274.5759016740.

The spelling of 20700806 in words is "twenty million, seven hundred thousand, eight hundred six".