20806070 has 16 divisors (see below), whose sum is σ = 37504080. Its totient is φ = 8310624.

The previous prime is 20806069. The next prime is 20806073. The reversal of 20806070 is 7060802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806073) 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, 10736 + ... + 12524.

It is an arithmetic number, because the mean of its divisors is an integer number (2344005).

Almost surely, 2^20806070 is an apocalyptic number.

20806070 is a deficient number, since it is larger than the sum of its proper divisors (16698010).

20806070 is a wasteful number, since it uses less digits than its factorization.

20806070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959.

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

The square root of 20806070 is about 4561.3671196254. The cubic root of 20806070 is about 275.0405229540.

Adding to 20806070 its reverse (7060802), we get a palindrome (27866872).

The spelling of 20806070 in words is "twenty million, eight hundred six thousand, seventy".