20630868 has 12 divisors (see below), whose sum is σ = 48138720. Its totient is φ = 6876952.

The previous prime is 20630851. The next prime is 20630879. The reversal of 20630868 is 86803602.

It is a tau number, because it is divible by the number of its divisors (12).

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 in 3 ways as a sum of consecutive naturals, for example, 859608 + ... + 859631.

It is an arithmetic number, because the mean of its divisors is an integer number (4011560).

Almost surely, 2^20630868 is an apocalyptic number.

It is an amenable number.

20630868 is an abundant number, since it is smaller than the sum of its proper divisors (27507852).

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

20630868 is a wasteful number, since it uses less digits than its factorization.

20630868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719246 (or 1719244 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20630868 is about 4542.1215307387. The cubic root of 20630868 is about 274.2663331110.

The spelling of 20630868 in words is "twenty million, six hundred thirty thousand, eight hundred sixty-eight".