20705008 has 20 divisors (see below), whose sum is σ = 40312648. Its totient is φ = 10301760.

The previous prime is 20704987. The next prime is 20705017. The reversal of 20705008 is 80050702.

It is a self number, because there is not a number n which added to its sum of digits gives 20705008.

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, 310 + ... + 6442.

Almost surely, 2^20705008 is an apocalyptic number.

It is an amenable number.

20705008 is a deficient number, since it is larger than the sum of its proper divisors (19607640).

20705008 is a wasteful number, since it uses less digits than its factorization.

20705008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6352 (or 6346 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 20705008 is about 4550.2755960491. The cubic root of 20705008 is about 274.5944788875.

The spelling of 20705008 in words is "twenty million, seven hundred five thousand, eight".