21200108 has 6 divisors (see below), whose sum is σ = 37100196. Its totient is φ = 10600052.

The previous prime is 21200093. The next prime is 21200117. The reversal of 21200108 is 80100212.

It is a junction number, because it is equal to n+sod(n) for n = 21200092 and 21200101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2650010 + ... + 2650017.

It is an arithmetic number, because the mean of its divisors is an integer number (6183366).

Almost surely, 2^21200108 is an apocalyptic number.

It is an amenable number.

21200108 is a deficient number, since it is larger than the sum of its proper divisors (15900088).

21200108 is a wasteful number, since it uses less digits than its factorization.

21200108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300031 (or 5300029 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 21200108 is about 4604.3575013242. The cubic root of 21200108 is about 276.7659707072.

The spelling of 21200108 in words is "twenty-one million, two hundred thousand, one hundred eight".