20321545412 has 24 divisors (see below), whose sum is σ = 40646296320. Its totient is φ = 8708546880.

The previous prime is 20321545411. The next prime is 20321545457. The reversal of 20321545412 is 21454512302.

It is not an unprimeable number, because it can be changed into a prime (20321545411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511712 + ... + 549992.

It is an arithmetic number, because the mean of its divisors is an integer number (1693595680).

Almost surely, 2^20321545412 is an apocalyptic number.

It is an amenable number.

20321545412 is an abundant number, since it is smaller than the sum of its proper divisors (20324750908).

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

20321545412 is a wasteful number, since it uses less digits than its factorization.

20321545412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57251 (or 57249 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 20321545412 in words is "twenty billion, three hundred twenty-one million, five hundred forty-five thousand, four hundred twelve".