20023630 has 32 divisors (see below), whose sum is σ = 40681440. Its totient is φ = 7029120.

The previous prime is 20023609. The next prime is 20023643. The reversal of 20023630 is 3632002.

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 15 ways as a sum of consecutive naturals, for example, 52 + ... + 6328.

It is an arithmetic number, because the mean of its divisors is an integer number (1271295).

Almost surely, 2^20023630 is an apocalyptic number.

20023630 is an abundant number, since it is smaller than the sum of its proper divisors (20657810).

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

20023630 is a wasteful number, since it uses less digits than its factorization.

20023630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20023630 is about 4474.7770894202. Note that the first 3 decimals coincide. The cubic root of 20023630 is about 271.5486223990.

Adding to 20023630 its reverse (3632002), we get a palindrome (23655632).

The spelling of 20023630 in words is "twenty million, twenty-three thousand, six hundred thirty".