20311455012 has 48 divisors (see below), whose sum is σ = 49903795200. Its totient is φ = 6412085280.

The previous prime is 20311454959. The next prime is 20311455013. The reversal of 20311455012 is 21055411302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20311455013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 798937 + ... + 823967.

It is an arithmetic number, because the mean of its divisors is an integer number (1039662400).

Almost surely, 2^20311455012 is an apocalyptic number.

It is an amenable number.

20311455012 is an abundant number, since it is smaller than the sum of its proper divisors (29592340188).

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

20311455012 is a wasteful number, since it uses less digits than its factorization.

20311455012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28616 (or 28614 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 20311455012 its reverse (21055411302), we get a palindrome (41366866314).

The spelling of 20311455012 in words is "twenty billion, three hundred eleven million, four hundred fifty-five thousand, twelve".