20006630 has 32 divisors (see below), whose sum is σ = 41333760. Its totient is φ = 6829920.

The previous prime is 20006621. The next prime is 20006641. The reversal of 20006630 is 3660002.

It is a junction number, because it is equal to n+sod(n) for n = 20006599 and 20006608.

It is a congruent number.

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, 21311 + ... + 22229.

It is an arithmetic number, because the mean of its divisors is an integer number (1291680).

Almost surely, 2^20006630 is an apocalyptic number.

20006630 is an abundant number, since it is smaller than the sum of its proper divisors (21327130).

20006630 is a wasteful number, since it uses less digits than its factorization.

20006630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20006630 is about 4472.8771501127. The cubic root of 20006630 is about 271.4717526604.

Adding to 20006630 its reverse (3660002), we get a palindrome (23666632).

The spelling of 20006630 in words is "twenty million, six thousand, six hundred thirty".