21060108 has 48 divisors (see below), whose sum is σ = 55132000. Its totient is φ = 6951744.

The previous prime is 21060097. The next prime is 21060131. The reversal of 21060108 is 80106012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10878 + ... + 12666.

Almost surely, 2^21060108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21060108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27566000).

21060108 is an abundant number, since it is smaller than the sum of its proper divisors (34071892).

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

21060108 is a wasteful number, since it uses less digits than its factorization.

21060108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 21060108 is about 4589.1293291865. The cubic root of 21060108 is about 276.1553945344.

The spelling of 21060108 in words is "twenty-one million, sixty thousand, one hundred eight".