20770208 has 12 divisors (see below), whose sum is σ = 40891410. Its totient is φ = 10385088.

The previous prime is 20770187. The next prime is 20770229. The reversal of 20770208 is 80207702.

It is an interprime number because it is at equal distance from previous prime (20770187) and next prime (20770229).

It can be written as a sum of positive squares in only one way, i.e., 16224784 + 4545424 = 4028^2 + 2132^2 .

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, 324503 + ... + 324566.

Almost surely, 2^20770208 is an apocalyptic number.

It is an amenable number.

20770208 is a deficient number, since it is larger than the sum of its proper divisors (20121202).

20770208 is an equidigital number, since it uses as much as digits as its factorization.

20770208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649079 (or 649071 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 20770208 is about 4557.4343659564. The cubic root of 20770208 is about 274.8824092292.

The spelling of 20770208 in words is "twenty million, seven hundred seventy thousand, two hundred eight".