20970806 has 8 divisors (see below), whose sum is σ = 31541664. Its totient is φ = 10456920.

The previous prime is 20970797. The next prime is 20970811. The reversal of 20970806 is 60807902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13310 + ... + 14801.

It is an arithmetic number, because the mean of its divisors is an integer number (3942708).

Almost surely, 2^20970806 is an apocalyptic number.

20970806 is a deficient number, since it is larger than the sum of its proper divisors (10570858).

20970806 is a wasteful number, since it uses less digits than its factorization.

20970806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28486.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20970806 is about 4579.3892605892. The cubic root of 20970806 is about 275.7645106776.

The spelling of 20970806 in words is "twenty million, nine hundred seventy thousand, eight hundred six".