20630064 has 80 divisors (see below), whose sum is σ = 65606912. Its totient is φ = 5439744.

The previous prime is 20630063. The next prime is 20630069. The reversal of 20630064 is 46003602.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20630064.

It is not an unprimeable number, because it can be changed into a prime (20630063) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2007 + ... + 6729.

Almost surely, 2^20630064 is an apocalyptic number.

20630064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20630064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32803456).

20630064 is an abundant number, since it is smaller than the sum of its proper divisors (44976848).

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

20630064 is a wasteful number, since it uses less digits than its factorization.

20630064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754 (or 4748 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20630064 is about 4542.0330249790. The cubic root of 20630064 is about 274.2627702782.

Adding to 20630064 its reverse (46003602), we get a palindrome (66633666).

The spelling of 20630064 in words is "twenty million, six hundred thirty thousand, sixty-four".