21022108 has 6 divisors (see below), whose sum is σ = 36788696. Its totient is φ = 10511052.

The previous prime is 21022103. The next prime is 21022117. The reversal of 21022108 is 80122012.

It is a junction number, because it is equal to n+sod(n) for n = 21022091 and 21022100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2627760 + ... + 2627767.

Almost surely, 2^21022108 is an apocalyptic number.

It is an amenable number.

21022108 is a deficient number, since it is larger than the sum of its proper divisors (15766588).

21022108 is a wasteful number, since it uses less digits than its factorization.

21022108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255531 (or 5255529 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 21022108 is about 4584.9872409855. The cubic root of 21022108 is about 275.9892000255.

The spelling of 21022108 in words is "twenty-one million, twenty-two thousand, one hundred eight".