20321040212 has 48 divisors (see below), whose sum is σ = 39010356672. Its totient is φ = 9185633280.

The previous prime is 20321040197. The next prime is 20321040217. The reversal of 20321040212 is 21204012302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321040217) 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, 7835588 + ... + 7838180.

It is an arithmetic number, because the mean of its divisors is an integer number (812715764).

Almost surely, 2^20321040212 is an apocalyptic number.

20321040212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20321040212 is a deficient number, since it is larger than the sum of its proper divisors (18689316460).

20321040212 is a wasteful number, since it uses less digits than its factorization.

20321040212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528 (or 3526 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20321040212 its reverse (21204012302), we get a palindrome (41525052514).

The spelling of 20321040212 in words is "twenty billion, three hundred twenty-one million, forty thousand, two hundred twelve".