20281108 has 6 divisors (see below), whose sum is σ = 35491946. Its totient is φ = 10140552.

The previous prime is 20281091. The next prime is 20281123. The reversal of 20281108 is 80118202.

It can be written as a sum of positive squares in only one way, i.e., 15272464 + 5008644 = 3908^2 + 2238^2 .

It is a super-2 number, since 2×20281108² = 822646683415328, which contains 22 as substring.

It is a congruent number.

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, 2535135 + ... + 2535142.

Almost surely, 2^20281108 is an apocalyptic number.

It is an amenable number.

20281108 is a deficient number, since it is larger than the sum of its proper divisors (15210838).

20281108 is a wasteful number, since it uses less digits than its factorization.

20281108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070281 (or 5070279 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 20281108 is about 4503.4551180177. The cubic root of 20281108 is about 272.7075903237.

It can be divided in two parts, 2028 and 1108, that added together give a square (3136 = 56²).

The spelling of 20281108 in words is "twenty million, two hundred eighty-one thousand, one hundred eight".