20775208 has 32 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 9521280.

The previous prime is 20775199. The next prime is 20775211. The reversal of 20775208 is 80257702.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 20775208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508 + ... + 6916.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^20775208 is an apocalyptic number.

It is an amenable number.

20775208 is an abundant number, since it is smaller than the sum of its proper divisors (21560792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20775208 is a wasteful number, since it uses less digits than its factorization.

20775208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4465 (or 4461 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 20775208 is about 4557.9828871991. The cubic root of 20775208 is about 274.9044648865.

The spelling of 20775208 in words is "twenty million, seven hundred seventy-five thousand, two hundred eight".