20105142312 has 64 divisors (see below), whose sum is σ = 50545872000. Its totient is φ = 6664089600.

The previous prime is 20105142311. The next prime is 20105142403. The reversal of 20105142312 is 21324150102.

It is not an unprimeable number, because it can be changed into a prime (20105142311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3240189 + ... + 3246387.

It is an arithmetic number, because the mean of its divisors is an integer number (789779250).

Almost surely, 2^20105142312 is an apocalyptic number.

It is an amenable number.

20105142312 is an abundant number, since it is smaller than the sum of its proper divisors (30440729688).

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

20105142312 is a wasteful number, since it uses less digits than its factorization.

20105142312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946 (or 6942 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 20105142312 its reverse (21324150102), we get a palindrome (41429292414).

The spelling of 20105142312 in words is "twenty billion, one hundred five million, one hundred forty-two thousand, three hundred twelve".