20630624 has 48 divisors (see below), whose sum is σ = 47932416. Its totient is φ = 8553600.

The previous prime is 20630611. The next prime is 20630641. The reversal of 20630624 is 42603602.

It is a self number, because there is not a number n which added to its sum of digits gives 20630624.

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 7 ways as a sum of consecutive naturals, for example, 5459 + ... + 8429.

It is an arithmetic number, because the mean of its divisors is an integer number (998592).

Almost surely, 2^20630624 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 20630624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23966208).

20630624 is an abundant number, since it is smaller than the sum of its proper divisors (27301792).

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

20630624 is a wasteful number, since it uses less digits than its factorization.

20630624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019 (or 3011 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20630624 is about 4542.0946709640. The cubic root of 20630624 is about 274.2652518630.

The spelling of 20630624 in words is "twenty million, six hundred thirty thousand, six hundred twenty-four".