20123112 has 16 divisors (see below), whose sum is σ = 50307840. Its totient is φ = 6707696.

The previous prime is 20123099. The next prime is 20123119. The reversal of 20123112 is 21132102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20123119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419208 + ... + 419255.

It is an arithmetic number, because the mean of its divisors is an integer number (3144240).

Almost surely, 2^20123112 is an apocalyptic number.

It is an amenable number.

20123112 is an abundant number, since it is smaller than the sum of its proper divisors (30184728).

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

20123112 is a wasteful number, since it uses less digits than its factorization.

20123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838472 (or 838468 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20123112 is about 4485.8791780430. The cubic root of 20123112 is about 271.9975850420.

Adding to 20123112 its reverse (21132102), we get a palindrome (41255214).

The spelling of 20123112 in words is "twenty million, one hundred twenty-three thousand, one hundred twelve".