20120450412 has 12 divisors (see below), whose sum is σ = 46947717656. Its totient is φ = 6706816800.

The previous prime is 20120450411. The next prime is 20120450417. The reversal of 20120450412 is 21405402102.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20120450411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838352089 + ... + 838352112.

Almost surely, 2^20120450412 is an apocalyptic number.

It is an amenable number.

20120450412 is an abundant number, since it is smaller than the sum of its proper divisors (26827267244).

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

20120450412 is a wasteful number, since it uses less digits than its factorization.

20120450412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676704208 (or 1676704206 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 20120450412 its reverse (21405402102), we get a palindrome (41525852514).

The spelling of 20120450412 in words is "twenty billion, one hundred twenty million, four hundred fifty thousand, four hundred twelve".