20123412 has 48 divisors (see below), whose sum is σ = 49080192. Its totient is φ = 6410880.

The previous prime is 20123401. The next prime is 20123417. The reversal of 20123412 is 21432102.

It is a junction number, because it is equal to n+sod(n) for n = 20123391 and 20123400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123417) 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, 26713 + ... + 27455.

It is an arithmetic number, because the mean of its divisors is an integer number (1022504).

Almost surely, 2^20123412 is an apocalyptic number.

It is an amenable number.

20123412 is an abundant number, since it is smaller than the sum of its proper divisors (28956780).

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

20123412 is a wasteful number, since it uses less digits than its factorization.

20123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20123412 is about 4485.9126161797. The cubic root of 20123412 is about 271.9989367029.

Adding to 20123412 its reverse (21432102), we get a palindrome (41555514).

The spelling of 20123412 in words is "twenty million, one hundred twenty-three thousand, four hundred twelve".