20700208 has 10 divisors (see below), whose sum is σ = 40106684. Its totient is φ = 10350096.

The previous prime is 20700193. The next prime is 20700217. The reversal of 20700208 is 80200702.

It is a super-4 number, since 4×20700208⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646866 + ... + 646897.

Almost surely, 2^20700208 is an apocalyptic number.

It is an amenable number.

20700208 is a deficient number, since it is larger than the sum of its proper divisors (19406476).

20700208 is a wasteful number, since it uses less digits than its factorization.

20700208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293771 (or 1293765 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 20700208 is about 4549.7481248966. The cubic root of 20700208 is about 274.5732576872.

The spelling of 20700208 in words is "twenty million, seven hundred thousand, two hundred eight".