20630912 has 32 divisors (see below), whose sum is σ = 41585400. Its totient is φ = 10193920.

The previous prime is 20630893. The next prime is 20630963. The reversal of 20630912 is 21903602.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10487 + ... + 12297.

Almost surely, 2^20630912 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 20630912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20792700).

20630912 is an abundant number, since it is smaller than the sum of its proper divisors (20954488).

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

20630912 is an equidigital number, since it uses as much as digits as its factorization.

20630912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 20630912 is about 4542.1263742877. The cubic root of 20630912 is about 274.2665280892.

The spelling of 20630912 in words is "twenty million, six hundred thirty thousand, nine hundred twelve".