20321020012 has 24 divisors (see below), whose sum is σ = 37411592400. Its totient is φ = 9643870656.

The previous prime is 20321020003. The next prime is 20321020043. The reversal of 20321020012 is 21002012302.

It is a junction number, because it is equal to n+sod(n) for n = 20321019974 and 20321020001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1477743 + ... + 1491430.

It is an arithmetic number, because the mean of its divisors is an integer number (1558816350).

Almost surely, 2^20321020012 is an apocalyptic number.

It is an amenable number.

20321020012 is a deficient number, since it is larger than the sum of its proper divisors (17090572388).

20321020012 is a wasteful number, since it uses less digits than its factorization.

20321020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969265 (or 2969263 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20321020012 its reverse (21002012302), we get a palindrome (41323032314).

The spelling of 20321020012 in words is "twenty billion, three hundred twenty-one million, twenty thousand, twelve".