20112512 has 32 divisors (see below), whose sum is σ = 45793920. Its totient is φ = 8619264.

The previous prime is 20112503. The next prime is 20112517. The reversal of 20112512 is 21521102.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (20112517) 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, 10328 + ... + 12119.

It is an arithmetic number, because the mean of its divisors is an integer number (1431060).

Almost surely, 2^20112512 is an apocalyptic number.

It is an amenable number.

20112512 is an abundant number, since it is smaller than the sum of its proper divisors (25681408).

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

20112512 is an equidigital number, since it uses as much as digits as its factorization.

20112512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22468 (or 22456 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 20112512 is about 4484.6975371813. The cubic root of 20112512 is about 271.9498177319.

Adding to 20112512 its reverse (21521102), we get a palindrome (41633614).

The spelling of 20112512 in words is "twenty million, one hundred twelve thousand, five hundred twelve".