20012630 has 32 divisors (see below), whose sum is σ = 40220928. Its totient is φ = 7106400.

The previous prime is 20012609. The next prime is 20012683. The reversal of 20012630 is 3621002.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 2615 + ... + 6845.

It is an arithmetic number, because the mean of its divisors is an integer number (1256904).

Almost surely, 2^20012630 is an apocalyptic number.

20012630 is an abundant number, since it is smaller than the sum of its proper divisors (20208298).

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

20012630 is a wasteful number, since it uses less digits than its factorization.

20012630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20012630 is about 4473.5478090661. The cubic root of 20012630 is about 271.4988881269.

Adding to 20012630 its reverse (3621002), we get a palindrome (23633632).

The spelling of 20012630 in words is "twenty million, twelve thousand, six hundred thirty".