20023612 has 48 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 8274240.

The previous prime is 20023609. The next prime is 20023643. The reversal of 20023612 is 21632002.

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, 152787 + ... + 152917.

It is an arithmetic number, because the mean of its divisors is an integer number (864864).

Almost surely, 2^20023612 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 20023612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20756736).

20023612 is an abundant number, since it is smaller than the sum of its proper divisors (21489860).

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

20023612 is a wasteful number, since it uses less digits than its factorization.

20023612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20023612 is about 4474.7750781464. The cubic root of 20023612 is about 271.5485410305.

Adding to 20023612 its reverse (21632002), we get a palindrome (41655614).

The spelling of 20023612 in words is "twenty million, twenty-three thousand, six hundred twelve".